I had multiple arguments around situations like this.

There are essentially two camps. The one side says:

- You can sell for cash, use mixers, NFT sales, $other_sophisitacted_technology and get away with it

The other side argues:

- You won't be able to ever cash out this sum and law enforcement will use sophisticated data mining on the blockchain and will eventually bust you

I think in reality it is like any illicit asset worth $650 Mio. It's gonna be extremely hard to launder but not impossible.