A money crown is a type of headwear that can be made out of paper bills. The number of bills required to make a money crown depends on the size of the headwear and the denominations of the bills used. For example, if you are using $1 bills, you will need 100 bills to make a money crown that fits an average adult-sized head. If you are using $5 bills, you will need 20 bills to make a money crown that fits an average adult-sized head.