Easy to do
5 Second reset
Use your own wallet
Can be performed anywhere
This effect does not rely on complex set ups or intricate slight of hand. It can be performed by anyone who has a hand and a wallet (some money might help too) in any situation and in any location.
It's a perfect effect for when you are paying for something at a shop, then you can just pull out your wallet and shock the cashier as your money rises up into your hand.