New flash: governments regularly "unmix" bitcoins. BTC, BCH, etc, are *not* "clean" after mixing! #Monero #SHUM https://krebsonsecurity.com/wp-content/uploads/2019/05/Wall-Street-Market-adminstrator-COMPLAINT.pdf
Exchange Crypto > XMR. Exchange XMR > Crypto I now have "clean" crypto. Using XMR skips the entire middleman process of course. We're one big raid away from Monero being mainstream.
Unfortunately, it doesn't work that way. Non-fungible coins are non-fungible. No matter how openly and cleanly you acquired them, they may have been "tainted" 2, 3, 4+ txns before you