When a person wants something, food for example, he must give something of value to the seller of the food to buy the food, or else the seller won’t sell it. Money was invented to facilitate this trade. Money is simply a medium of exchange making it possible for people to trade their goods and services for other goods and services conveniently. The best money, of course, is something that holds its value (relatively speaking), is easily divisible, and is accepted by as many people as possible. Traditionally this has been gold and silver. More recently, pieces of paper have been used as a substitute for the best money, again, for convenience. Unfortunately, pieces of paper can be printed, using ever larger numbers on them, without any backing or any relation to the value that is given in exchange for that paper. The recipients must have faith that the next person will accept that paper when it’s time to pass it along and buy something else with it. And when people realize that the paper they are receiving for their goods won’t hold its value, they will discount its value, unload it more quickly, and eventually refuse to accept it.