The biggest problem wouldn't be breaking the chain but the final step of cashing out. A regular exchange requires KYC for large amounts. Although P2P Crypto/

The biggest problem wouldn't be breaking the chain but the final step of cashing out. A regular exchange requires KYC for large amounts. Although P2P Crypto/Cash exchanges exist (local{bitcoins, monero}) most simply don't have the volume and still leaves the question of where the money came from.