I don't believe pirate will be able to return all of the bitcoins to ALL of his investors in a week.
He has to buy them if he doesnt already have them, which if he does, why not return them right now eh?
Bingo!
Yes, but he will give them back to some investors and they might decide to list their gains for some profit. Leaving him to buy their coin right back, and then dish it out and repeat. I wonder how the prices will be.