Then there’s the individual who stole 2,000 BTC in June 2011, which sent the value of bitcoin crashing from $17.50 to $0.01, and the hacker who swiped more than half the coins held by the exchange at the time, when Mt. Gox CEO Mark Karpelès left the wallet on a drive with unencrypted network. Fortunately for Karpelès the hacker got cold feet and negotiated a 1% bounty, leading to a loss of just 3,000 BTC for the exchange, rather than 300,000 BTC.
