What if you found a wallet on the floor with a lot of money inside of it, would you take it?

When I was a boy, I returned the wallet, several years ago, I took the cash, kept the wallet (it was nice, I still use it) and shredded the id and credit cards in case someone fished them out of the trash. This could be considered a metaphor for youthful idealism versus adult pragmatism, but basically I just need money now and then I did not.