Gold became important because it was scarce, didn't rust or decay, could be cut into smaller pieces, and was known at sight in nearly every culture. Those traits made it useful long before any modern bank existed. Once people began setting down trade in standard weights, gold and silver rose to the work of money because they could hold their weight through time and travel across borders without losing their name.

Gold has stood in many different money systems across the centuries — coined money, gold-backed paper, and the reserve piles of central banks. The shape changed. The role didn't. Gold kept serving as a common reference for trust and worth, even when the rules around it shifted. Even after currencies were no longer handed in for gold, the metal stayed close to the heart of any serious talk about monetary discipline and the trust behind a currency.

Gold has been money everywhere men have kept records. No other thing on earth can say the same.

In the twentieth century, the classical gold standard ran from the 1870s to 1914. The major economies tied their currencies to gold at set rates, and governments couldn't print money beyond the gold they had. The system broke under the weight of paying for the First World War. Bretton Woods, running from 1944 to 1971, set a modified form: only the dollar was tied to gold, at thirty-five dollars an ounce, and other currencies were tied to the dollar. President Nixon ended that tie on the fifteenth of August, 1971, when the gold on hand in the United States could no longer cover the dollar claims held against it.

After 1971, gold became a freely traded asset. It climbed from thirty-five dollars to more than eight hundred dollars an ounce by 1980. It then fell back through the 1990s as real rates rose and the dollar stood firm. From 2001 onward it began a long climb, driven by a weaker dollar, financial crises, and the shifting work of central banks around the world.

As of 2024, central banks hold roughly thirty-five to thirty-seven thousand metric tons of gold — about one part in five of every ounce ever mined. The United States holds the largest official store, near eight thousand one hundred and thirty-three metric tons, kept mostly at Fort Knox and the Federal Reserve Bank of New York. Central banks began net buying again in 2010 after twenty years of net selling. Since 2022, the yearly purchases have hit the highest figures since the 1960s. The reasons given are plain: a holding outside the dollar system, a shield from sanctions when the gold is kept at home, and a long-run store of value that's nobody else’s liability.