Thiers' Law

Thiers' law holds that good money drives out bad when people are free to choose which money to accept: sellers begin refusing a depreciating currency and demand harder money instead. It is the mirror image of Gresham's law, and was named after the French statesman Adolphe Thiers by the economist Peter Bernholz in his studies of hyperinflation.

Why it matters

Gresham's law, under which bad money circulates and good money hides, operates only while a fixed exchange rate or legal tender rule forces the two to trade at par. When enforcement fails or inflation grows extreme, the dynamic flips. In Zimbabwe's hyperinflation, which reached an estimated 79.6 billion percent monthly in November 2008, the population abandoned the Zimbabwe dollar outright, and the government capitulated to dollarization in 2009. Venezuela, Argentina, and wartime economies show the same sequence: the failing currency is not hoarded but shunned, while dollars, gold, and increasingly stablecoins and bitcoin become the money people insist on receiving.

In the gold vs bitcoin debate

Thiers' law describes the moment both assets are waiting for, when savers and merchants get to choose their money rather than have it chosen for them. Gold has played the refuge role in every major currency collapse in history. Bitcoin's advocates argue it is now the more practical refuge, transferable across borders and immune to confiscation at checkpoints, and point to grassroots adoption in high-inflation economies as Thiers' law operating in real time.