A previous outspoken critic of Bitcoin says he's starting to come around on the virtual currency, one month to the day after he called on regulators to ban it. In an interview with the Washington Post, Sen. Joe Manchin (D-W. Va.) said recent moves by the Internal Revenue Service, private Bitcoin entrepreneurs and other government officials have buoyed his faith in the government's ability to "get more of a handle" on digital cash. "Sure, it makes us look at it differently," said Manchin. "It sure will. When I said what I said, it was because it was totally unencumbered. The whole thing lent itself to a lot of improprieties — especially in the underworld, if you will, whether it be drugs or arms. Those were the things I was concerned about."