Define launder,
I like to think of black, grey, white money.
black is pure illegal money, made from crime and needs cleaning so i recommend cash to bitcoin using bisq.network or some other dex platform. Next we turn the black money grey by converting the bitcoin into monero and then moving the monero to another wallet. Now setup a business like a consultancy and take monero, next book sessions with yourself using your grey xmr and the money sat in the consultancy wallet is now white. Exchange this and pay your taxes..