Today’s 21.5-percent drop pales in comparison to the Bitcoin crash of April 2013, when the currency lost half its value within six hours as an anonymous owner was giving away bitcoins on reddit. Another noted “Bitcoin crash”—which bottomed out in October 2011—saw the currency slowly lose more than 90 percent of its value over the course of four months. (via Amid Silk Road uncertainty, Bitcoin value drops over 20% in 3 hours | Ars Technica)