what are the 4 types of money 
money can be something determined by market participants to have value and be exchangeable money can be currency bills and coins issued by a government a third type of money is fiat currency which is fully backed by the economic power and good faith of the issuing government the fourth type of money is money substitutes which are anything that can be exchanged for money at any time for example a check written on a checking account at a bank is a money substitute 