Situation: You find a wallet full of cash in a restaurant.
What could you do?
Ask the people around me and look for the owner. If I can't find it, give it to the reception
What should you do?
Give it to the owner but if I can't find it, give it to the waiter or take it to reception.
What would you do?
Look for an identity document in your wallet and do not touch your belongings!
What would most people do?
most people would not return the wallet.