Silver-level articleBitcoin

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the best part about bitcoins is that you get to watch libertarians slowly discover why financial regulations exist to begin with
—@porn_horse[1]

Bitcoin (code: BTC, XBT[2]) is an Internet-based digital currency and payment network; it uses strong cryptography to prevent users from duplicating money. Bitcoin's independence from the control of governments, corporations, or other centralized entities tends to appeal to libertarians, anarcho-capitalists, and technophiles.[3] At the same time, it also does not enjoy the security and protection which those large bodies can ostensibly provide, making it a volatile and often insecure asset.

Bitcoin was first proposed by a person known only by the apparent pseudonym of "Satoshi Nakamoto" in late 2008, at the height of the banking crisis.[4] The identity of him/her/them has been a continuing source of intrigue.[5]

The currency is designed to employ lots of computers to process and record transactions. The solution to this is "mining," in which Bitcoin users run software to do all the necessary work.[6] Every time someone successfully proves they performed this work, they receive bitcoins in return. This provides an incentive to keep the currency running, but also attracts a lot of prospectors and speculators looking for easy money, and scammers who consider them suitably exploitable suckers.[7]

In 2014, the cryptocurrency began a sharp decline after a principal exchange, Mt. Gox, shut down following three months of blatant market manipulation.[8][9] It was later revealed that an undiscovered "leak" in the company's bitcoin wallet had rendered them insolvent in 2012, and virtually penniless by 2014.[10] Essentially, Bitcoin's astronomical rise was the direct result of meaningless trades with fake money.[11]

Contents

[edit] Economics

The seasteading of numismatics. And it's going to get even funnier.
It's like a house on fire with freshly baked cookies inside.
—Pyro Cat[12]

The notable bit about Bitcoin is that it is intended to be entirely decentralised. The blockchain, the cryptographically-authenticated public ledger of every Bitcoin transaction ever, is reconciled by agreement of over 50% of all miners — an attempt at a practical solution to the Byzantine Generals' Problem[wp] in computer science.[13]

There is no central bank backing Bitcoin; previous virtual currencies, such as E-Gold, Flooz, Beenz, Lindens, or WoW gold have always had an organisation behind them. This lack of a monetary authority means that, were governments to try to do something about it, they would not have a central point of attack.[14] Bitcoin therefore presents a rare sandbox/universe-in-a-jar scenario for observing market interactions in a free banking[wp] system, as Austrian schoolers have always wanted — this time in the context of post-industrial economies.

You can buy actual stuff with bitcoins! Mostly internet services, geek toys, phone sex,[15] illegal drugs[16] and, of course, pre-used Bitcoin mining hardware.[17] And actually useful things like beer and pizza.[18][19] To allow payment with a high-volatility currency like Bitcoin, it is common for merchants to price their goods in the local standard currency, but receive payment via Bitcoin converted at current market rates.[20]

Bitcoin has no intrinsic value (i.e., has no use-value), similar to the US dollar,[21] and could be a general currency if 300 million people similarly behaved as though it was one, i.e., would do work in exchange for it.[22] Its biggest problem as an exchange medium is that it is not widely accepted, and that trading is thus very thin indeed.

There is also the matter of built-in deflation: there is a strictly limited possible number of bitcoins, and the processing power to mine new ones goes up as more miners join.[23] Also, if your wallet file is deleted, your bitcoins are gone for good.

"Babbage" at The Economist took it seriously and found it quite interesting,[24] but has muted his praise over time.[25] Other economists have criticized the idea (to the point of calling it a scam), citing inherent design problems.[26][27][28][29][30] Paul Krugman initially refrained from poking fun at the concept, but considered it a reimplementation of the gold standard, with the economic problems that implies;[31] he's since judged it as effectively just another right-wing affinity fraud, in which big libertarians prey upon smaller ones.[32] Warren Buffett has called it a "mirage."[33] About 25% of the European Central Bank's report on "Virtual Currency Schemes" is about Bitcoin,[34] and both the European Banking Authority and US Consumer Financial Protection Bureau have warned about major consumer protection issues.[35][36]

The trouble with re-implementing the gold standard in the 21st century is that financial attacks, just like cryptographic attacks, don't get less effective with time — if you apply attacks evolved in a hundred years of Red Queen's race against regulation, then remove the regulation, the subeconomy in question is utterly defenseless. As one quant on Hacker News outlined:[37]

Bitcoin takes the monetary system back essentially a hundred years. We know how to beat that system. In fact, we know how to nuke it for profit. Bitcoin is volatile, inherently deflationary and has no lender of last resort. Cornering and squeezing would work well - they use mass in a finite trading space. Modern predatory algos like bandsaw (testing markets by raising and suddenly dropping prices), sharktooth (electronically front-running orders), and band-burst (creating self-perpetuating volatile equilibria in a leverage-sensitive trading space, e.g. an inherently deflationary one), would rapidly wreak havoc. There is also a part of me that figures regulators will turn a blind eye to Bitcoin shenanigans.

And we can now see this in practice: the $1200/BTC peak in late 2013 was caused by the market manipulation known as "painting the tape";[38] Mt. Gox in particular appears to have suffered chronic tape-painting.[39] Note that the "free market" completely failed to deal with fraud in this environment: all other exchanges were tracking Mt. Gox's blatantly skewed prices.

Jean-Paul Rodrigue's "phases of a bubble" chart, c. 2008.
Bitcoin prices, January 2012 to October 2014. Totally no resemblance to the above.

[edit] The 51% attack

Bitcoin relies on distributed consensus: the blockchain is what a majority of mining capacity says it is. Since mining is the "core of the Bitcoin protocol," there is the possibility of what is termed a "51% attack," where miners could consolidate into a cartel to exceed 50% of the mining power (yes, a de facto monopoly) and so could unilaterally ratify the entire blockchain to do things like double-spending confirmed transactions and preventing any new transactions or just ones they don't like from happening while they're in control (though they cannot take other people's coins).[40][41] But this was considered unlikely because Bitcoin enthusiasts were highly distributed individualists.

This worked quite well early on. However, proof-of-work algorithms benefit from economies of scale,[wp] which leads to centralization directly. So as mining became more difficult and demanded more specialized resources, single mining "pools" became a substantial fraction of Bitcoin's network hashrate. In June 2014, mining pool GHash reached 51%, leading to calls to use decentralized pooling options.[42] In 2015, nine mining pools control 75% of the hashpower.[43]

Economically, it would be foolish for, e.g., GHash to just kick over the board because they could — cornering the market in an insubstantial good is only worth it while people trust the value of the insubstantial good — but the actual problem is that the group with 51% of all mining capacity will be able to "undermine the rules of the currency itself."[44] GHash quickly backed down to under 50% and claims it wants to fix the deeper problem,[45] but the economic incentives of "selfish mining" remain.

Cornell researchers have identified many more subtle attacks one can make even with less than 50%,[46] and it is worth noting that GHash had previously conducted a "49% attack" (a "Finney attack"[47]) — wherein a large miner double-spends coins, just not with certainty — against a gambling site.[48] They blamed this on a rogue employee, but this in itself shows that individuals can be motivated to trash a whole system for temporary personal gain. Again, real financial systems have government regulation for this specific threat.

[edit] Hardware

So who's doing the maths? The answer is the most powerful distributed computing project in the world.[49] While other distributed computing systems are investigating protein folding or sifting through radiotelescope data for signs of intelligent communication from the stars, bitcoins are being generated by people running hashing algorithms to process transactions on a poorly-traded virtual currency.

But it's long past the point where you can do any decent amount of processing on a standard desktop system (or, as some less-than-ethical Bitcoiners have, sneaking processing code into Javascript on web pages, or simply deploying a Trojan on someone's Windows box). Bitcoin miners quickly moved to the GPUs of video cards, then field-programmable gate arrays (FPGAs) specifically programmed for the algorithm, and now mining is done on ASICs based on said FPGAs. There are even companies selling Bitcoin mining rigs; their frequently-sketchy workmanship wouldn't endear them to IT pros or the FTC, but they're still better than some of the firetrap rigs that Bitcoiners have put together for themselves.[50] The many bizarre and frankly stupid cooling schemes are usually good for a laugh as well, including one Darwin Award applicant who poured a bucket of liquid nitrogen on the floor next to his rig to cool it.[51]

The irony of all this is that once hardware and power costs are factored in, it's hard to make a profit from Bitcoin mining. Many more-savvy Bitcoiners filch their power from someone else and don't factor in the equipment cost at all.

Bitcoin is also an environmental disaster, using on the order of 24 gigawatt-hours a day, literally wasted on computing hashes. For comparison, the entire nation of Ireland runs about 72 GWh a day average.[52][53] The network cost per transaction (of any size) is around $20 of electricity.[54] (Thus, Bitcoin runs on libertarians externalising their costs to others.[55]) If only they'd based it on protein folding.[56]

[edit] Advocates

The cryptography is robust, so many highly vocal internet libertarians think this is all that is needed, because they don't understand people, know very little about economics, and apparently nothing of how reliable financial computing infrastructures are built — real banks tend to use mainframes in highly redundant configurations, not AWS virtual servers without backups — and generally show terrifying naïveté and incompetence. This then bites them in the arse when they discover that running a Magic: The Gathering Online card exchange site is insufficient experience to securely run a currency exchange,[57] or discover they have no backups.[58] Many were sufficiently naïve as to fall for, not just a Ponzi scheme, but a Ponzi scheme that had already been tried in EVE Online's in-game currency.[59] There are also people who understand this level of computer science, but still keep their wallet.dat file in plain text on a Windows box, ready for reaping by malware or a DDoS.[60][61][62] This is the sort of thing that gets bitcoins called "Dunning-Krugerrands."[63]

The decentralised nature attracts libertarian extremists (go read any Bitcoin forum for more wacko libertarianism than you ever thought possible). There are Bitcoin advocates who are not annoying Randroid fools, but the ones who are tend to drown out all the others. It is unsurprising, then, that some business writers have accused them of cultish behaviour;[44][64] some proponents are simply aghast that anyone might not consider it valuable for services rendered.[65]

One of the otherwise-saner advocates is Rick Falkvinge, founder of the Swedish Pirate Party, who has put all his savings into bitcoins.[66] Though, he also details its problems.[67] He is a big fan of Bitcoin not as a general currency, but as a pure medium of exchange, substituting for PayPal or credit cards and changing back into a more popular currency at each end — as the Visa/Mastercard/PayPal oligopoly's willingness to block recipients they, the American government or fundamentalists don't like, starts to become a practical problem.

Andrew Napolitano from Fox Business Network supports Bitcoin as well. In a move that may make many of his fans cry, Ron Paul does not.[68]

[edit] Banks and exchanges

There are multiple Bitcoin "banks," but most of this seems to revolve around doing things with bitcoins,[69] leading to accusations of cargo cult economics. And scams. There are lots of scammers in the Bitcoin community, who are punished by the harshest method imaginable: getting a "scammer" tag on the BitcoinTalk.org forum.

One Bitcoin exchange, Bitcoin-Central (now called Paymium), has achieved bank status in France.[70] Their aim is to supply an alternative to PayPal, and their central bank backing on balances only applies to accounts in euros rather than in bitcoins. On the other hand, other players in the Bitcoin field have had to suspend operations because US banks view companies involved with Bitcoin as too high risk to do business with,[71] or have had to suspend US dollar withdrawals for undisclosed reasons.[72]

[edit] China

Despite Western-oriented services being portrayed as synonymous with the Bitcoin "brand" — Mt. Gox was still responsible for 90% of all Bitcoin transactions by the end of 2012,[73] so this isn't entirely unwarranted — Chinese exchanges actually overtook it in output before its collapse.[74] This presents another serious problem for the cryptocurrency moving forward: attempts by the US government to impose regulations post-Gox pale in comparison to recent pressure by Beijing to crack down on the Chinese market.[75] One incentive is off-the-books currency exchange: buy hardware and electricity in yuan, make it into bitcoins and sell the bitcoins for dollars.

[edit] The scheme

The trouble with a thinly-traded currency: a typical one-day plummet in price, that happens whenever someone dumps some coins.
[This] Bitcoin crash is traumatic. I haven't seen this many libertarians cry since they found out Ayn Rand took Social Security for eight years.
—Drew Fairweather[76]

In order to prop up the initial system, Bitcoin mining was designed to bribe early users with exponentially better rewards than latecomers could get for the same effort. To join the network at all, new users must give ever-increasing amounts of wealth to previous bitcoiners who are sitting around doing nothing. This effectively makes Bitcoin a pump-and-dump scheme wherein these early adopters, who have more bitcoins than anyone else ever will, hype it up so they can offload their bitcoins onto fools who think they'll strike it rich as speculators. This means the system runs on opportunism, especially among people who like the idea of decentralized techno-money. This setup is defended as an acceptable trade-off and/or a fair reward for propping up the system.[77]

In the meantime, speculators and opportunists have remained Bitcoin's main users: according to one 2012 study, only 22% of existing bitcoins were in circulation at all, there were a total of 75 active users/businesses with any kind of volume, one (unidentified) user owned a quarter of all bitcoins in existence, and one large owner was trying to hide their wealth accumulation by moving it around in thousands of smaller transactions.[78] Meanwhile, businesses, from family stores to multimillion-dollar corporations, have jumped onto Bitcoin to seem forward-looking and get a cut of the Bitcoin action.[79] But go on, dive in and get rich.

[edit] More mundane problems

The real and overriding issue with Bitcoin is that it does practically nothing that isn't already possible, while also introducing flaws of its own:

  • For the average person it's far more hassle than it's worth when the rest of the world takes traditional currencies (or "fiat" on Bitcoin communities, who use it as a snarl word[80]) and that there's nothing they can buy with Bitcoin that they can't buy with the money they already have. Responses to this range from wishful thinking that this will be irrelevant when Bitcoin takes over the world and then goes to the Moon, to assertions that people will choose Bitcoin despite its comparative lack of utility simply because they like the idea.
  • Much is made of Bitcoin's efficiency for buying things online — but there's almost nothing you can buy with Bitcoin that you can't buy with the money you already have, and a credit or debit card already lets you buy things online with minimal hassle and with fraud protection. Escrow is touted as a solution for this, but there are almost no working examples. When Butterfly Labs stiffed people on Bitcoin mining equipment, Bitcoiners who paid with filthy fiat via PayPal were able to raise chargebacks and get their money refunded, which many did gleefully;[81] those who paid with Bitcoin had no recourse other than the courts.
  • Almost all online retailers who supposedly accept Bitcoin actually charge whatever the price of the product would be in conventional currency at the current exchange rate, then cash in the bitcoins as soon as is feasible. This raises questions about how stable Bitcoin's "economy" is when a lot of its participants wouldn't be involved if they couldn't get conventional money out of it.
  • Being a distributed computing project means that Bitcoin transactions are at the mercy of not only network latency (like credit or fund transfer transactions) but the time it takes for the transaction to be processed and stored around the network. The protocol design is for this to take approximately ten minutes — barely usable for network orders, but problematic for point-of-sale use (The beer-selling example doesn't bother reconciling in real time, as the owner is treating the Bitcoin risk as a marketing expense). In 2015, transaction times over an hour are increasing in frequency.
  • Bitcoin is already failing to scale. It is limited to a worldwide total of 7 transactions per second, due to the design of the protocol,[82] and around 2.7 transactions per second in practice[83] (Compare PayPal, which claims 115 transactions per second average;[84] Visa, which ran approximately 15,000 transactions per second in 2013, with a capacity of 47,000 transactions per second;[85] even Western Union alone averages 29 transactions per second.[86]). The blockchain passed 30 gigabytes in March 2015,[87] which is large enough to be problematic for individuals to download. A stress test by some Reddit /r/bitcoin posters sent confirmation times to eight hours with very little effort or expense.[88]

Whenever some of these objections are raised, the common Bitcoiner reply is to think about things from the merchant's point of view — that they pay less in fees (which isn't necessarily true), or that they might get chargebacks (which can be defended against, and generally don't happen to merchants who don't actually scam people or rip them off). This ignores that most people don't care, and the few that do see enough benefit and convenience from being able to get fraudulently taken money returned to them that it doesn't actually bother them.

In practice, the only thing Bitcoin does better than conventional currencies and existing payment systems is to let libertarians buy illicit goods without having to go to the bad part of town and talk to minorities.

[edit] Other distributed cryptocurrencies

A number of copycat cryptocurrencies ("altcoins") exist as a consequence of the Bitcoin experiment, only a few of which, such as Litecoin and Dogecoin, have achieved any notability. A few of these have significant distinctions from Bitcoin, such as Namecoin which is part of a decentralized ".bit" DNS project and Freicoin which incorporates demurrage to discourage speculative hoarding, but most of them are simple forks of the Bitcoin code. Since the media attention on Bitcoin in early 2013[89] a glut of such "coins" has flooded the market, with increasingly silly names like BBQcoin, Memecoin, Junkcoin, Sexcoin, and Shitcoin.[90] And don't forget Coinye West.[91]

Dogecoin[92] gained some popularity on cuteness value and use for tipping on Reddit.[93] Unlike most altcoins, Dogecoin is slightly inflationary rather than deflationary.[94] Despite having similar get-rich hopes, Dogecoin fans are also notably less dickish than Bitcoin fans, though that's not hard to achieve.

Many Bitcoin advocates really don't like altcoins:[95] most of the value proposition of Bitcoin is the strictly limited quantity available, and they perceive altcoins as undermining their hodling, instead suggesting the way to resolve Bitcoin's scaling problems without altcoins is with hypothetical add-ons such as sidechains.[96] (Though sidechain developers themselves are not so optimistic.[97]) They dismiss altcoins as scams (though they don't regard the substantially-premined Bitcoin as one). However, there is no way for them to stop altcoins from being created.

To be fair, quite a lot of altcoins since the 2013 boom were blatant scams: make a coin, premine it, promise far-fetched features in BitcoinTalk's altcoin forum,[98] get it onto an exchange, sell it for Bitcoins. USBCoin, for example, netted 150 BTC this way.[99] DafuqCoin compromised exchanges because nobody checked the code before running it.[100][101] And then there's Ponzicoin, which, despite having Ponzi in the name, lasted a few months before being exposed, shockingly, as a Ponzi scheme. BitcoinTalk dealt with these coins firmly: it limited advertisement signature image dimensions.

[edit] The moral of the story

In a gold rush, the money's in selling shovels. Cash up front, please.

(Unless you're Butterfly Labs, in which case the shovel-sellers are crooks too).

[edit] External links

[edit] Footnotes

  1. https://twitter.com/porn_horse/status/435568115791826945
  2. As per the ISO currency code standard, "BTC" is actually incorrect as a descriptor for Bitcoin. Currency codes are made up of an ISO country code (e.g. "GB" for the United Kingdom) and a third letter denoting the currency unit ("P", so "GBP" for the pound sterling). "BTC" therefore would imply a Bhutanese currency. "XBT" is unofficial, but is in line with the standard as non-currencies like gold and international currency units get an "X" prefix. Of course, as Bitcoiners are often both ignorant of how the world works and arrogant enough to think they can sweep the whole lot away, this often gets ignored and it's referred to as "BTC" anyway.
  3. What is Bitcoin and how does it work?, Mashable
  4. The Gospel according to St. Satoshi (the original Bitcoin paper)
  5. The Rise and Fall of Bitcoin, Wired
  6. 7 things you need to know about Bitcoin, PCWorld
  7. Meet the Suckers, it's like dot-com investing all over again! (5/6 are still in the game.)
  8. Bitcoin Exchange Mt. Gox Goes Offline Amid Allegations of $350 Million Hack, Wired (Later revised to half a billion USD.)
  9. What the Bitcoin theft might look like if it happened in the real world, Maclean's
  10. The Missing MtGox Bitcoins,WizSec Report, Mt. Gox Hack,
  11. [1],WizSec Report, Mt. Gox Trade Bot
  12. "Bitcoin hits $1000"
  13. [2]The Byzantine General's Problem: Lamport, Shostak, and Pease for SRI International
  14. You would be picturing the Randgasms right about now.
  15. "Anything goes. Can roleplay."
  16. The Underground Website Where You Can Buy Any Drug Imaginable (Adrian Chen, Gawker, 2011-06-01); Silk Road has since been busted by the FBI and revived, and then busted again. (There are also lots of other marketplaces including Black Market Reloaded and Sheep Marketplace Never mind.)
  17. Court extends Butterfly Labs asset freeze, Ars Technica
  18. Disruptions: Betting on a Coin With No Realm, The New York Times
  19. London's Bitcoin pub, Wired
  20. "Eliminate Bitcoin Volatility Risk with BitPay"
  21. One significant difference is that the US government usually asks people to pay taxes in US dollars.
  22. The real litmus test for a currency, of course, is whether you can buy sex with it. Bitcoin passes for phone sex, so let's end the Fed!
  23. And down if miners leave.
  24. Bits and bob (Babbage, The Economist, 2011-06-13); print version
  25. Bitcoin bank heist (Babbage, The Economist, 2014-02-26)
  26. There Are Smart Kinds of Money and Dumb Kinds of Money, Brookings Institution
  27. Is Bitcoin a Real Currency? An economic appraisal, NBER
  28. The Bitcoin Question: Currency versus Trust-less Transfer Technology, OECD
  29. Heads or Tails? What the Future Holds for Bitcoin and ‘Altcoins’, University of Pennsylvania
  30. In Search of a Stable Electronic Currency, The New York Times
  31. Golden Cyberfetters, The New York Times
  32. The Long Cryptocon, The New York Times
  33. Buffett: ‘Stay Away’ From Bitcoin, VentureBeat (The author's belief that the currency should be rebranded as 'Bitgold' is particularly ironic because that was the name of one of its precursors.)
  34. Virtual Currency Schemes: October 2012, ECB
  35. Warning to consumers on virtual currencies, EBA
  36. CFPB warns consumers about bitcoin 'Wild West', The Hill
  37. Professional Traders Show Interest in Bitcoin, Hacker News
  38. Bitcoin's Vast Overvaluation Appears Caused by Price-fixing, Falkvinge
  39. Bots were responsible for bitcoin’s stratospheric ascent, anonymous report claims, GigaOM
  40. The Economics of Bitcoin Mining: Bitcoin in the Presence of Adversaries, Princeton University (They describe it more ominously as a "Goldfinger attack.")
  41. https://en.bitcoin.it/wiki/Weaknesses#Attacker_has_a_lot_of_computing_power
  42. https://www.cryptocoinsnews.com/p2pool-become-easier-coincadence-acquires-p2pool-org/
  43. https://tradeblock.com/blog/bitcoin-network-capacity-analysis-part-3-miner-incentives
  44. 44.0 44.1 The Doomsday Cult of Bitcoin, New York Magazine
  45. Ghash.io: We Will Never Launch a 51% Attack Against Bitcoin, CoinDesk
  46. How a Mining Monopoly Can Attack Bitcoin, Hacking Distributed
  47. http://bitcoin.stackexchange.com/questions/4942/what-is-a-finney-attack
  48. GHash.IO and double-spending against BetCoin Diceimg (RoadTrain, BitcoinTalk forums, 30 October 2013)
  49. Wikipedia's list of distributed computing projects listed Bitcoin at 312,000 teraflops equivalent as of November 2012; second place was Folding@home at 8,588 teraflops as of February 2012. Bitcoin actually uses integer calculations, so that number's fudged, but it's still the largest by a ridiculous margin. Actual participant numbers were much smaller: a few thousand for Bitcoin, a few hundred thousand for Folding@home.
  50. The Bitcoin Mining Accidents blog has disappeared, but you may enjoy the most famous tale from it, of heatstroke-induced brain damage from an overheating Bitcoin rig. In 2014, a huge bitcoin mine burned down in Bangkok, Thailand, showing that not just small-time idiots are susceptible to getting burned.
  51. Somehow he didn't asphyxiate.
  52. Bitcoin power consumption is estimated at between 0.1 and 10 GW average over 2014; Ireland consumed around 3 GW average. O'Dwyer and Malone. "Bitcoin Mining and its Energy Footprint." Presented at ISSC 2014 / CIICT 2014, Limerick, June 26–27 2014.
  53. 982MWh per day in 2013: Bitcoin’s Environmental Problem, CleanTechnica
  54. $20 in October 2014; peak was $90/transaction in January 2014. (NASDAQ charges way less in comparison per transaction, indicated by the fact that your broker makes money with said commissions.)
  55. Then comes the argument that in a libertarian world everyone would have generated their own power and those who want to make more money would "invest in infrastructures" and keep their tools of trade in working order.
  56. Someone did come up with CureCoin, which rewards both ASICs securing the blockchain and CPU/GPU protein folding. Note that protein folding doesn't have the same security properties hashes have.
  57. Inside the Mega-Hack of Bitcoin: the Full Story (Jason Mick, DailyTech, 2011-06-19)
  58. "No database backups ... Everyone had root."
  59. Suspected multi-million dollar Bitcoin pyramid scheme shuts down, investors revolt, The Verge
  60. Bitcoin-stealing trojan spotted in the wild, VentureBeat
  61. Mac Bitcoin-stealing malware spreads via cracked versions of Angry Birds and other apps, Polygon
  62. Bitcoin’s skyrocketing value ushers in era of $1 million hacker heists, Ars Technica
  63. In mathematics we trust, MetaFilter
  64. The Bitcoin personality cult lives on, Financial Times
  65. The average Bitcoin evangelist. (Want to laugh for a few more minutes? Here's a full collection of insane Bitcoin comments from Reddit — yes, they're all real.)
  66. Why I'm Putting All My Savings Into Bitcoin, Falkvinge
  67. "Bitcoin's Four Hurdles," parts 1, 2, 3, and 4
  68. Ron Paul Slams Stability of US Dollar and Bitcoin in Pro-Gold Rant, The Raw Story
  69. Firm says online gambling accounts for almost half of all Bitcoin transactions, Ars Technica
  70. Virtual cash exchange becomes bank, BBC
  71. Bitspend ceases trading due to frozen accounts, CoinDesk
  72. Mt. Gox temporarily suspends USD withdrawals, CoinDesk
  73. Bitcoin trading volume since 2010 at Bitcoinity
  74. Timeline: a history of Bitcoin in China in 2013, Tech in Asia
  75. Bitcoin’s Uncertain Future in China, United States-China Economic and Security Review Commission
  76. "Look at the big picture!"
  77. FAQ – Economy on the "official" Bitcoin Wiki.
  78. A look at the Bitcoin network transaction history, TechnoLlama
  79. What Companies Accept Bitcoin?, NASDAQ
  80. Note that in real economics, "fiat" simply means "money not backed by a commodity". Thus, Bitcoin is also fiat. The usage of "fiat" as a snarl word comes from goldbug screeds. Bitcoiners adopted this usage of the word without realising the term also applied to Bitcoins.
  81. Refunds!
  82. Scalability on the "official" Bitcoin Wiki.
  83. https://bitcointalk.org/index.php?topic=941331.msg10360199#msg10360199
  84. https://www.paypal-media.com/about
  85. Stress Test Prepares VisaNet for the Most Wonderful Time of the Year, Visa
  86. Western Union 2013 Annual Report, page 2
  87. Higher and higher.
  88. Stress Test Recap (45sbvad, /r/bitcoin, 30 May 2015); graph
  89. Because Cyprus. [3] [4]
  90. The Shitcoin term has already been in use by Bitcoin detractors to describe Bitcoin, and by cryptocurrency enthusiasts for coins with no potential and those which have already failed. In October 2013 someone did the obvious and introduced a Shitcoin for real.
  91. Coinye developers say they're abandoning project as Kanye West escalates legal battle, The Verge
  92. To the moon!
  93. Online Donors Send Jamaican Bobsled Team To Sochi, NPR
  94. Dogecoin to allow annual inflation of 5 billion coins each year, forever, Ars Technica
  95. Call the whambulance
  96. "Sidechains Can Replace Altcoins and ‘Bitcoin 2.0' Platforms"
  97. http://www.reddit.com/r/Bitcoin/comments/393h73/blockstream_to_release_first_opensource_code_for/cs09dsq?context=4
  98. e.g. USBcoin
  99. USBcoin Confirmed As Scam, Removed From Bittrex, Fifth Scam Coin on Bittrex Exchange In Little Over A Month (Ian DeMartino, CoinTelegraph, 28 July 2014)
  100. Dafuq Coin, the first malware coin (Cryptocurrency Times, 4 May 2014)
  101. READ ME NOW! - dafuqcoin is a trojan - pool operators/exchanges beware (BitcoinTalk, 22 April 2014)
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