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FILE - In this April 7, 2014 file photo, a man arrives for the Inside Bitcoins conference and trade show in New York. The February 2014 arrests of Pascal Reid and Michell Espinoza marked the first time any state has brought money laundering charges involving bitcoins, according to Miami-Dade State Attorney Katherine Fernandez Rundle. And it's likely to be a closely-watched test of whether criminal law can adapt to new digital forms of payment. (AP Photo/Mark Lennihan)