What does 'hard money' mean?

Detailed explanation

Hard money and easily expandable money are comparative terms. A money supply is considered harder when new units can only be created slowly relative to existing stock, at high cost or under strict, verifiable rules. A more expandable supply can respond more strongly to credit demand, institutional decisions or changing economic conditions.

The mechanisms differ. Additional gold production requires exploration, investment and extraction. In modern fiat systems, commercial banks create deposit money when expanding their balance sheets, for example through lending; central banks create central bank money through monetary operations. This creation is not unlimited: regulation, financing, credit demand and monetary policy influence it, among other factors.

Bitcoin's new issuance follows a publicly verifiable block subsidy schedule. The subsidy decreases at defined intervals, and consensus rules limit planned total issuance. Supply is therefore not increased in the short term simply because demand or market price rises.

No supply arrangement is automatically good, bad or stable in value on that basis alone. Harder supply can make unexpected expansion more difficult but guarantees neither demand, purchasing power nor stable prices. More flexible supply can adjust liquidity and credit provision but brings other dependencies and risks. An objective assessment must consider supply rules, institutions, use and demand separately.