Bitcoins And U.S. Dollar Notes As IMF Vouches For Virtual Currencies [Getty Images]

A collection of U.S. one dollar bills sit on top of a U.S. five dollar bill in this arranged photograph in London, U.K., on Friday, Jan. 29, 2016. The International Monetary Fund extolled the potential benefits of virtual currencies and said they warrant a more nuanced regulatory approach, at a time when the future of bitcoin, the most well-known example, is in doubt's. Bitcoin traded at about $379 on Jan. 20, about a third of its peak in 2013. Photographer: Chris Ratcliffe/Bloomberg via Getty Images

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