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Articles · The 21 Million Limit

Bitcoin vs Gold: Which Is Scarcer?

There is a single measurement that explains why gold was money for five thousand years. By that same measurement, gold now has company.

Picture every ounce of gold ever mined, melted down and poured into one block. All of it, from the pharaohs' tombs to the bars in central bank vaults to the ring on your hand. The block would be a cube under 23 meters on each side, small enough to sit inside a baseball infield.1 Five thousand years of digging produced that much and no more.

That stubbornness is the reason gold became money. It is also the yardstick for judging anything that claims to be a rival.

The Measurement That Made Gold Money

People have used many things as money: shells, salt, cattle, copper, silver. Most failed the same way. When the thing became valuable, someone found a way to produce a lot more of it, and the people who had saved in it were diluted.

Economists capture this with a ratio called stock-to-flow. The stock is everything that already exists. The flow is what gets added in a year. Divide one by the other and you learn how many years of production it would take to double the supply. The higher the number, the harder it is for new supply to water down existing holders.

Gold's numbers are remarkable. About 222,600 tonnes sit above ground, and mines add roughly 3,600 tonnes a year.1 That is a stock-to-flow of around 60, and annual supply growth of about 1.6 percent. Silver, copper, and every other metal score far lower, which is why they lost the contest. As the economist Saifedean Ammous put it, gold was chosen by the market because it had the slowest supply growth of all metals.2

Where Bitcoin Stands on the Same Yardstick

New bitcoin is issued on a schedule fixed in its software, and the amount is cut in half roughly every four years. After the most recent cut, in April 2024, about 164,000 new bitcoin are issued each year against roughly 20 million already in existence.3

GoldBitcoin
Existing supplyAbout 222,600 tonnesAbout 20 million coins
Added each yearAbout 3,600 tonnesAbout 164,000 coins
Annual supply growthAbout 1.6%About 0.8%
Stock-to-flowAbout 60About 120
Ultimate limitUnknown21 million

By the measurement that crowned gold, Bitcoin passed it in 2024, and the gap widens at the next halving in 2028, when Bitcoin's new supply falls by half again. This does not prove Bitcoin is better money. It does mean that, for the first time, something scores higher than gold on the test gold has always won.

The Difference That Does Not Show in the Ratio

There is a deeper distinction than the ratio itself. Gold's supply responds to its price. When gold becomes more valuable, mines that were too costly to run become profitable, exploration budgets grow, and more metal comes out of the ground. The response is slow, which is gold's great strength, but it is real.

Bitcoin's supply does not respond to price at all. If the price doubles and twice as many miners compete, the network adjusts its difficulty so that blocks still arrive about every ten minutes, carrying the same reward as before. Demand can change the price. It cannot change the amount issued. No commodity has worked that way before.

Gold also has an unknown ceiling. Nobody knows how much remains in the earth's crust, under the sea floor, or beyond. Bitcoin's total is known in advance to the last unit.

What Gold Still Does Better

A fair comparison runs in both directions, and gold has advantages no newcomer can claim.

Its record is five thousand years long. Bitcoin's is seventeen. Gold needs no electricity, no network, and no software to exist; a coin buried in a field is still gold when it is dug up centuries later. Central banks hold tens of thousands of tonnes of it as a reserve. And its price, while it moves, has been far steadier than Bitcoin's, which can fall by half in a year and has done so more than once.

Bitcoin's advantages are of a different kind. It can be sent across the world in minutes, divided into tiny fractions, and checked for authenticity by anyone with a computer, where gold must be shipped, assayed, and guarded. Those are the very weaknesses that led the world to replace gold coins with paper claims in the first place, and then to drop the gold behind the paper.

Scarcity Is the Beginning of the Argument

Scarcity alone does not make something money. Plenty of rare things are worthless. What made gold money was scarcity that people could rely on, joined to durability and wide acceptance earned over a very long time. Bitcoin has matched and passed gold on the first of those. It is still earning the others.

Scripture is unsentimental about where even the best treasure ranks:

"Do not lay up for yourselves treasures on earth, where moth and rust destroy and where thieves break in and steal."

Matthew 6:19

Neither gold nor Bitcoin is an answer to that verse. The reason to care about sound money is not to hoard it but to steward honestly what you have been given, in a unit that does not shrink while you hold it. Why that matters, and what broke in 1971 when the dollar's link to gold was cut, is the subject of the free first lesson.

Sources

  1. World Gold Council, "How much gold has been mined?" (above-ground stock and cube estimate) and Gold Supply and Demand Statistics (annual mine production).
  2. Saifedean Ammous, The Bitcoin Standard (Wiley, 2018), chapters on scarcity and stock-to-flow.
  3. Bitcoin's issuance after the April 2024 halving is 3.125 bitcoin per block, about 52,560 blocks a year. See the Bitcoin Wiki, "Controlled supply". Ratios are calculated from these figures.

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