In a Thursday evening speech, one Treasury official made it clear that the department is serious about regulating cryptocurrency exchanges. “[O]ur regulations cover both transactions where the parties are exchanging fiat and convertible virtual currency, but also to transactions from one virtual currency to another virtual currency,” said Kenneth A. Blanco, director of the Treasury’s Financial Crimes Enforcement Network (FinCEN). He made the statement in a prepared speech at the 2018 Chicago-Kent Block (Legal) Tech Conference. This isn’t a new situation, of course. Blanco pointed out that FinCEN has held this view for five years, but his statements were meant to clarify their outlook. In other words, it was meant…