Yes it's an immutable ledger but...

there would be a few ways to cash this BTC out. They could sell the BTC directly to someone 'over the counter' for cash.
They could used a mixer to tumble the bitcoin, which would hide them. Blacklisting also depends on the compliance of exchanges, and it isn't possible for exchanges to blacklist wallets quickly enough given how quick they are to set up

Posted By: Hertz van Rental, Aug 1, 14:38:23