A year ago, when the entire stock of Bitcoin was worth $150m, authorities were concerned most by the potential use of a new digital currency by drug dealers and petty criminals to hide their trades and launder profits.
一年前，当市场上所有比特币的总价值仅为1.5亿美元时，政府当局最担心的是这种新型数字货币可能被贩毒分子和普通罪犯用于掩盖交易和洗钱。
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