My thinking is to basically hang onto it for a while myself and see if anything happens, just in case anyone comes looking for it. It's actually a bit odd when you show up at a bank or even anywhere with truly large amounts with no explanation behind it all. Sticks out, you see. If you're going to do something with it, do it little by little, spread it out a bit. Save your actual real money for the big hits and let this just...support you. That's what I'd do.