Where is the hint that he doesn't have the coins? I don't care if you sue or not, but i have no idea why you or anyone else would trust this guy after what he's done. He either lost are stole a shitload of coins, and no one did or is going to do anything about it. Why? Even in the best case scenario where something truly unexpected/unexplainable/unsolvable happened, why on earth would anyone have faith that a guy who has been silent for months will be able ot make up the entire debt?
And if you don't want to go after him for piercing the corporate veil, that's fine, but I still think peiople owed money should look into it. Again, not a lawyer, but to this layperson I see a big difference between a ceo "investing" in a "company" (especially one that's dead) and a ceo using personal funds to pay corporate debts. Good luck waiting for the magic to happen.