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Stacks of bitcoins sit near green lights on a data cable terminal inside a communications room at an office in this arranged photograph in London, U.K., on Tuesday, Sept. 5, 2017. Bitcoin steadied after its biggest drop since June as investors and speculators reappraised the outlook for initial coin offerings. Photographer: Chris Ratcliffe/Bloomberg via Getty Images
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A man holds a bitcoin token inside the offices of La Maison du Bitcoin bank in Paris, France, on Thursday, Nov. 23, 2017. Zimbabwe, where the price of bitcoin spiked to double the international rate after last week's military takeover, shows cryptocurrency skeptics where the real-world use of bitcoin, and possibly its future, lies. Photographer: Christophe Morin/Bloomberg via Getty Images
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A bitcoin token, left, a litecoin token, centre, and an ethereum token, sit in this arranged photograph in Danbury, U.K., on Tuesday, Oct. 17, 2017. On Wednesday, billionaire Warren Buffett said on CNBC that most digital coins won't hold their value. Photographer: Chris Ratcliffe/Bloomberg via Getty Images
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