Before the invention of currency, humans compensated others for doing a job or a chore with something that was conveniently available to him or herself. A man who owned a farm and had a large quanitity of livestock would reward a carpenter for fixing his house with a plump, supplying cow. The carpenter then used the milk of the cow to trade with a baker for fresh bread, because these items all rightfully have similar worth. These transactions were typically simple, and were negotiated based off the worth estimated by the people doing and recieving these deeds. It was up until humans decided that there should be a way to be able to pay off things without bartering that currency was created. Maybe more or less imagined.
On the island of Yap, the people created a way of exchanging a currency similar to the way we use currency today. The people of Yap discovered a precious stone far off on a separate island, which they would carve and polish into unnecessarily, inconveniently large “coins” and use to declare a level of wealth or to trade off for things of high cost. Although these stone “coins” were much too large for one person to manage, they still had an imaginative and metaphorical worthyness. Not only was their worth incomparable but the way they were traded was hard to grasp, seeing that the stones were rarely ever actually handed off from one person to another This was unlike the cow for the house or the milk for the bread. Imagine the farmer still having the cow, but it is under ownership of the carpenter. Or the milk remains in the carpenters home, but the baker can use it whenever he or she would like. As much as this way of transaction may seem unusual, it is quite firmiliar to how we work today.
The way that the people of Yap would put their stone under someone elses name, or the baker could have milk anytime he wanted, were prime examples of how people would put faith into others. The baker is faithful that “his” milk will be provided anytime he needed, just like how we are faithful that our banks will provide us “our” money when said. It also works vice versa, that the carpenter will recieve the bread from the baker much like how our bank expects us to pay off any debts and be responsible customers. Currency is a system of faith in others and acquiring ownership of things.