I hope, he will use that money to actually help people and do some good. (Best yet... just wait for the price of Bitcoin to increase... sell and give some back to the casino)
I doubt that. If he actually legitimately exploited the casino, he doesn't seem like the type of person to give back to the less fortunate since people like Robin hood exist in fairytales and not in reality.
He might have sold most of his stash back then and HODLED a small portion of it for the long-term or just sold it all at once.