If I understand correctly...
You can trace where it goes, but not the people at the end of it.
The ledger just shows "wallet abc123 sent 100 currencies to wallet def456".
The fun starts when you own lots of wallets, and split the money up and send it round in a complicated set of transactions - there are also services like banks where lots of people send plausibly legitimate money in and it comes out in various directions, but you can't work out which bits are the stolen money. You can also convert to any of the thousands of cryptocurrencies and send it across borders with ease.
It's all standard money laundering techniques which are old hat. Crypto just lets criminals have a new and fairly unreglated way of laundering it.
Biting the hand that feeds IT
