A customer prepares to use a Bitcoin automated teller machine (ATM) in this arranged photograph taken inside the Old Shoreditch Station cafe in London, U.K., on Friday, March 7, 2014. Bitcoin attracted media attention last week when Tokyo-based Mt. Gox, once the biggest exchange for the digital currency, filed for bankruptcy protection after coins valued at more than $500 million went missing. Photographer: Chris Ratcliffe/Bloomberg via Getty Images
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