krakman writes with this excerpt from Bloomberg News: "Bitcoin plunged more than 8 percent [Friday] after a Tokyo-based exchange halted withdrawals of the digital currency, citing technical malfunction. Mt. Gox, claimed in a blog post it needed to 'temporarily pause on all withdrawal requests to obtain a clear technical view of the currency processes.' It promised an 'update' — not a reopening — on Monday, Feb. 10, Japan time. This is day after Russia's Prosecutor General concluded Bitcoin and other digital currencies are illegal under current law."