“It’s completely Wild West,” said
Garth Bruen, a security fellow at the Digital Citizens Alliance, a Washington-based advocacy group that combats online crime. “There are a lot of people getting rich, and there are a lot of people stealing.”
But criminals have targeted the computers that store bitcoins in encrypted code, in depositories known as “hot wallets.” Over the past two weeks, it has become clear they have succeeded spectacularly in breaking those systems.
The most famous example is Mt. Gox, the Tokyo-based exchange that filed for bankruptcy Feb. 28. It started as a site to trade cards for a popular game but shifted very profitably to Bitcoin, at one point becoming the biggest site for buying the virtual currency.
Mt. Gox relied on technology that experts consider easy to use but hard to secure against hackers. When the exchange
declared bankruptcy, it reported having lost more $400 million from theft.