Even if it crashes, Bitcoin may make a dent in the financial worldIN 1999 an 18-year-old called Shawn Fanning changed the music industry for ever. He developed a service, Napster, that allowed individuals to swap music files with one another, instead of buying pricey compact discs from record labels. Lawsuits followed and in July 2001 Napster was shut down. But the idea lives on, in the form of BitTorrent and other peer-to-peer filesharers; the Napster brand is still used by a legal music-downloading service.The story of Napster helps to explain the excitement about Bitcoin, a digital currency, that is based on similar technology. In January a unit of Bitcoin cost around $15 (Bitcoins can be broken down to eight decimal places for small transactions). By the time The Economist went to press on April 11th, it had settled at $179, taking the value of all Bitcoins in circulation to $2 billion. Bitcoin has become one of the world’s hottest investments, a bubble inflated by social media, loose capital in search of the newest new thing and perhaps even by bank depositors unnerved by recent events in Cyprus.Just like Napster, Bitcoin may crash but leave a lasting legacy. Indeed, the currency experienced a sharp correction on April 10th—at one point losing close to half of its value before recovering sharply (see chart). Yet the price is the least interesting thing about Bitcoin, says Tony Gallippi, founder of BitPay, a firm that processes Bitcoin payments for merchants. More important is the currency’s ability to make e-commerce much easier than it is today.Bitcoin is not the only digital currency, nor the only successful one. Gamers on Second Life, a virtual world, pay with Linden Dollars; customers of Tencent, a Chinese internet giant, deal in QQ Coins; and Facebook sells “Credits”. What makes Bitcoin different is that, unlike other online (and offline) currencies, it is neither created nor administered by a single authority such as a central bank.Instead, “monetary policy” is determined by clever algorithms. New Bitcoins have to be “mined”, meaning users can acquire them by having their computers compete to solve complex mathematical problems (the winners get the virtual cash). The coins themselves are simply strings of numbers. They are thus a completely decentralised currency: a sort of digital gold.Bitcoin’s inventor, Satoshi Nakamoto, is a mysterious hacker (or a group of hackers) who created it in 2009 and disappeared from the internet some time in 2010. The currency’s early adopters have tended to be tech-loving libertarians and gold bugs, determined to break free of government control. The most infamous place where Bitcoin is used is Silk Road, a marketplace hidden in an anonymised part of the web called Tor. Users order goods—typically illegal drugs—and pay with Bitcoins.Some legal businesses have started to accept Bitcoins. Among them are Reddit, a social-media site, and WordPress, which provides web hosting and software for bloggers. The appeal for merchants is strong. Firms such as BitPay offer spot-price conversion into dollars. Fees are typically far less than those charged by credit-card companies or banks, particularly for orders from abroad. And Bitcoin transactions cannot be reversed, so frauds cannot leave retailers out of pocket.Yet for Bitcoins to go mainstream much has to happen, says Fred Ehrsam, the co-developer of Coinbase, a Californian Bitcoin exchange and “wallet service”, where users can store their digital fortune. Getting hold of Bitcoins for the first time is difficult. Using them is fiddly. They can be stolen by hackers or just lost, like dollar bills in a washing machine. Several Bitcoin exchanges have suffered thefts and crashes over the past two years. - Read more here: http://www.economist.com/news/finance-and-economics/21576149-even-if-it-crashes-bitcoin-may-make-dent-financial-world-mining-digital
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