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，當市場上所有比特幣的總價值僅爲1.5億美元時，政府當局最擔心的是這種新型數位幣可能被販毒分子和普通罪犯用於掩蓋交易和洗錢。
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