The Three Jobs of Money

Ask most people what money is for and they’ll say: buying things. That’s one job. But money actually has three — and understanding all three changes how you think about saving, inflation, and Bitcoin.

Job one: medium of exchange. This is the obvious one. Money lets you trade without needing someone who wants exactly what you have. Instead of carrying wheat to the market and hoping the shoemaker is hungry, you carry money — and the shoemaker accepts it because everyone else does too. Money is the universal middleman.

Job two: unit of account. Money gives everything a price. Without it, how do you compare the value of an hour of a doctor’s time versus a kilogram of bread? Money creates a common language for value — a way to measure, compare, and make decisions. Every price tag, every salary, every budget is money doing this second job.

Job three: store of value. This is the one most people forget — and the one that matters most for your financial life. Money should hold its value over time, so you can work today and spend tomorrow. Or next year. Or in retirement.

Here’s the problem: modern money does jobs one and two reasonably well. But job three? That’s where the system quietly fails. A dollar saved in 1971 has lost more than 90% of its purchasing power today. It bought things. It measured things. But it didn’t store value.

That gap — between what money promises and what it delivers — is exactly where Bitcoin enters the story.

Tomorrow: why gold became money everywhere, independently, across every civilization on earth.