I would be surprised if the U.S. legal system requires itself to list every possible mechanism by which someone might steal money.
> the legal tender of the United States or of any foreign country, or any counterfeit thereof
Bitcoin has, at times, met this standard by being the legal tender of a foreign country.
Something doesn’t have to be money to be involved in money laundering, obviously.
In fact, the U.S. has prosecuted and convicted people for money laundering simply for operating the bitcoin mixing service, which is clearly just bitcoins in and bitcoins out.