I think another important question is whether it will help his plea if he gives them the keys: He appears to be just an average shmo (no surprise) and I'm sure would be happy to give away his privkeys for a few years off of his sentence.
The other question is then whether the FBI would then liquidate the coins via an exchange, or just sit on them.
The other question is then whether the FBI would then liquidate the coins via an exchange, or just sit on them.