Bitcoin plunged after one of the largest exchanges halted trading because hackers stole about $65 million (¥6.6 billion) of the digital currency.
Bitcoin slumped 5.3 percent against the dollar as of 10:17 a.m. on Wednesday in Tokyo, bringing its two-day drop to 13 percent. Prices also sank 6.2 percent on Monday, although it was not clear if that initial move was related to the hack.
Hong Kong-based exchange Bitfinex said on Tuesday that it halted trading, withdrawals and deposits after discovering the security breach. The exchange said it was still investigating details and cooperating with law enforcement, but acknowledged that some bitcoin have been stolen from its users.