But Peter Vessenes, chairman and executive director of the Bitcoin Foundation, was unfazed by the Liberty Reserve crackdown.

"The U.S. put out guidance recently through the Financial Crimes Enforcement Network, and we've been following up on that guidance and crushing bad actors," he said in an interview with CNBC Asia. "We're seeing a bit of a sweep right now," he said.

"As a consumer, I stay away from companies that have questionable know-your-customer policies," he said. "They're suspiciously light on how much information they want about you.

Effective the May 31st, 2013 Tangible Cryptography has suspended new purchases of Bitcoins through our service FastCash4Bitcoins.  We take this step in response to a notice received on the same day from the Commonwealth of Virginia that a complaint has been made that our company is operating as an unlicensed money transmitter.