That is the same deal for any custodial wallet. Deposit coins, withdraw different coins, everything is opaque unless they share records. > That said there are

That is the same deal for any custodial wallet. Deposit coins, withdraw different coins, everything is opaque unless they share records. > That said there are probably less regulated exchanges out there for that kind of stuff. That is believed to be a big part of the illiquid altcoin market. Premine some altcoin, sell it at high prices to your dirty money account. Even where the exchange has "kyc" the launderer just needs a disposable identity for the dirty account that is good enough to pass it for a few days.