Fiat currency

The money in your pocket today is backed by nothing you can redeem it for. No gold, no silver — just the word of a government that it is money. That’s fiat: money by decree. “Fiat” is Latin for “let it be done”.

What actually gives it value?

A fiat note is a promise with no underlying asset. Its value rests on a few pillars:

• Legal tender laws — the state declares it must be accepted to settle debts.
• Taxes — you owe your taxes in this currency, so you must acquire it, which creates constant demand.
• Network effect and trust — everyone else accepts it, so you do too (the same reason any money works).

The power — and the temptation

Fiat hands the issuer an extraordinary tool: the money supply is no longer limited by how much metal you can dig up. A central bank can create new currency at will — useful for fighting recessions and financing emergencies, but with no natural ceiling. And a supply with no ceiling is a supply that can be expanded whenever it’s politically convenient.

The track record

Every fiat currency in history has faced the same gravity. Freed from a hard anchor, supply tends to grow and value tends to erode — sometimes slowly (a dollar has lost most of its purchasing power over a century), sometimes catastrophically (Weimar Germany, Zimbabwe, and Venezuela, where prices doubled in days). The failures aren’t bad luck; they’re what happens when the people who benefit from printing also control the printer.

This is the deep problem sound-money thinkers keep returning to. It sets up the fragility of the banking system built on top of fiat (bank runs, next), and ultimately the search for a money the powerful cannot inflate — which is where Bitcoin will enter the story.