If he goes somewhere which doesn't have extradition, FED's will just call him and tell him they will go public that he has $4B bitcoin and ALL criminals will be hunting them after that.
Granted, their billions aren't in cash. However, once he fled the country he could immediately start converting his position to other assets that aren't so easily stolen. He'd also be able to afford to hide himself, pay taxes and bribes, and pay for some security.