Yesterday it was the US Treasury’s Financial Crimes Enforcement Network that tightened its grip on businesses that accept Bitcoin. Today, it is China, where the world’s largest Bitcoin exchange by trading volume, BTCChina announced that he had received word from “above” that his platform would no longer be able to accept renminbi from BTC buyers. “As of right now, we have received notice from our third-party payment company that they will disallow customers from making deposits into our exchange,” Bobby Lee, a former Yahoo developer who co-founded BTCChina this year, told the Financial Times. The result, not surprisingly, is an overnight crash in BTC, which crashed by 50% from $900 two days ago to just $455 hours ago.

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