What Is Money and Why Does It Exist

Think about the money you have. Is it in your wallet? In an account? Here’s a fact that might surprise you: over 90% of the world's money isn't physical cash. It exists only as digital numbers in computer systems. Money has changed more in the last 50 years than it did in the previous 3,000. Understanding its real nature is the first step to mastering it.

Before money, there was barter—trading things directly. A farmer might trade wheat for a blacksmith's tools. But this system has a huge flaw, often called the 'double coincidence of wants.' It only works if the blacksmith happens to want your wheat at that exact moment.Money solves this problem. It's a tool everyone agrees has value. This concept evolved over thousands of years, from cowrie shells in Africa to the first metal coins in ancient Turkey and paper money in China. Today, most money is fiat money, meaning it has value because a government declares it does and people trust it, not because it's made of gold.Money serves three key functions:Medium of Exchange: You use it to buy things, from a coffee to a car.Unit of Account: It provides a common measure of value. A phone costs X, a...

Kai, 18, was a talented graphic designer but was short on cash when their car's alternator died. The repair was going to cost 400 units of currency. Kai went to the mechanic and made a proposal: they would design a new logo and a full set of marketing flyers for the shop in exchange for the repair. The mechanic looked at his own bills. He needed to pay his supplier for parts and his landlord for rent. Neither of them accepted logos as payment. He politely declined Kai's offer. Kai realized that while their skills had value, they weren't a substitute for money, the one thing everyone agrees to accept.