Fiat Currency
Fiat currency is government-issued money that is not backed by a physical commodity like gold. Its value derives from government decree and public trust rather than inherent scarcity. All modern national currencies — the US dollar, euro, yen — are fiat currencies subject to unlimited supply expansion.
How It Works
Fiat currency operates on government authority. A central bank — the Federal Reserve, the European Central Bank, the Bank of Japan — has the power to create new units of currency at will. When governments spend more than they collect in taxes, they borrow, and central banks often monetize that debt by expanding the money supply. This process dilutes the purchasing power of every existing unit, a hidden tax known as inflation.
Every fiat currency in history has eventually lost the vast majority of its purchasing power. The US dollar has lost over 96% of its value since the Federal Reserve was created in 1913. Some currencies — the Zimbabwe dollar, Venezuelan bolivar, Argentine peso — have collapsed far faster through hyperinflation. The pattern is universal because the incentive structure is universal: governments always face political pressure to spend, and the printing press is always available.
Bitcoin was created as a direct response to this system. The genesis block famously contains a headline about bank bailouts. Where fiat currency has unlimited, politically-driven supply, Bitcoin has a fixed cap of 21 million enforced by mathematics and decentralized consensus. No committee can vote to print more bitcoin. This is not a feature — it is the entire point.
Key Points
- Fiat means "by decree" — its value comes from government mandate, not scarcity or backing
- Every fiat currency in history has lost significant purchasing power through inflation
- Central banks can and do expand the money supply, diluting existing holders' wealth
- Bitcoin was explicitly designed as an alternative to the fiat monetary system
- Understanding fiat's failure modes is key to understanding Bitcoin's value proposition