Comment Re: Very obliging (Score 3, Interesting) 28
If you are tumbling coins that were in anyway ill-gotten, it's pretty squarely money laundering under 18 U.S.C. 1956: https://www.law.cornell.edu/us....
Even if the coins you put in were all obtained legitimately, a strict reading of that law would seem to indicate that it's possible you could be charged with money laundering if you knew or reasonably should have known that other participants in the transaction were putting in tainted funds. That said, I doubt this would be very likely as prosecutors don't typically like having to prove people's internal state.