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A stack of Bitcoins stand in this arranged photograph in Danbury, U.K., on Thursday, Dec. 10, 2015. Bitcoin, the digital currency, climbed on Wednesday to hit its highest levels since early November, amid fresh speculation that the identity of Satoshi Nakamoto -- the virtual currency's creator -- may have finally been revealed. Photographer: Chris Ratcliffe/Bloomberg via Getty Images

A stack of Bitcoins stand in this arranged photograph in Danbury, U.K., on Thursday, Dec. 10, 2015. Bitcoin, the digital currency, climbed on Wednesday to hit its highest levels since early November, amid fresh speculation that the identity of Satoshi Nakamoto -- the virtual currency's creator -- may have finally been revealed. Photographer: Chris Ratcliffe/Bloomberg via Getty Images