Ah, so bizarre conspiracy theories and crystal ball predictions about a world government. That's what will lead to restitution. Okay. I'm out.
Before I go, it's much more likely governments will seek to simply shut down all exchanges with inadequate security much like they have done with copyright infringement. You don't see everyone who downloaded Game of Thrones being hauled before the courts. Law enforcement is too busy trying to shut down Pirate Bay. Restitution from the early days of bitcoin, before exchange security, won't be a priority. They didn't chase down Joseph Kennedy after they cracked down on insider trading.