The introduction of money made all the products easily exchangeable. The first forms of money were objects useful for their intrinsic value, any product with a high spread, such as cattle, rare shells or whale teeth.
Also in developed countries people sometimes have used as money some goods as tobacco.
The last time this has happened was immediately after the II World War with cigarettes as exchange goods. When goods are used as money, they take a value often different from their own intrinsic one. To be used as money increases the value of goods, according to the use that society makes of money. Then, the value of goods is not fix. For instance, gold, which has different value for different people, nowhere has such a value as where it’s used as money.
