My answer may seem to be strange, but I will address this suitcase with money to the law enforcement. Yes, it sounds quite unearthly, because everyone that finds suchlike will definitely keep it. However, I have another attitude in this situation. Inasmuch, I think that you can spend money you earned by own forces, but not spontaneous godsend. It would be honorable to give that bunch of money to people, who really need it.