The Bitcoin Standard, Saifedean Ammous

Last week's book, Broken Money, told you why the world left the hardest money it had: speed beat hardness in 1866. This week's book is the one Lyn Alden was answering.

It was written five years earlier, it sold more than a million copies by most accounts and reached thirty nine languages by the author's own count, and it argues the opposite half of the same story: hardness wins in the end, every time, and the hardest money ever made arrived in 2009.

The book has one argument, and the argument is a ratio. You can compute it yourself, for any money, from public numbers, and this lesson does. It also has a habit its own admirers wince at, and the desk will show you exactly where.

The question: why does the hardest money win, and what does the book get right and wrong about the one that's hardest now?

The book arrived at the worst possible moment, which is the first thing to know about it. Wiley published The Bitcoin Standard in 2018. The coin had touched nineteen thousand six hundred and fifty dollars on the Coinbase series the December before. By the time the reviews were out it was falling, and it ended the year near three thousand two hundred, down more than four fifths.

So the book wasn't read by people chasing a price. It was read, that year, by people who'd just lost most of one and wanted to know whether the idea underneath it was still standing. That's the readership that made it: not the top, the bottom.

What they found was a history book for its first half. Ammous, an economist, walks through every money that ever won and asks the same question of each: how hard was it to make more? Seashells lost to metal coins because a ship could bring a hold full of shells.

Silver lost to gold because gold was scarcer per year of digging. Every soft money, he argues, was eventually flooded by whoever could produce it cheapest, and the holders paid.

Then the turn, which is the same turn the money course made. In 1971 the last link to gold was cut, and for the first time the hardest money in use was a paper whose supply had no ceiling at all. The book's second half is what it says that did to the world, and its third is the case that a money with a supply fixed in code is the way back.

The book's claim in one line: the hardest money has always won, and for the first time the hardest money is one nobody can dig, print, or vote more of.

The reviewers split exactly where you'd expect. Reason, that July, praised the explanations and called out the passages that blame government money for society's cultural failings. The Cato Journal said the same in the autumn. Three years later a central bank in the Caribbean published a critique of the book's gold-standard history and, in its words, the lack of empirical evidence for his claims.

Ask the tycoon's question of the book. Who made the rule? An author with a thesis and a position. Who gains if he's right? Holders of the hard money. Who paid for reading it in 2018? Nobody who read the first half. The second half is where the desk's pencil comes out.

The book's engine is a single ratio, and it's the most useful tool on this shelf. Learn it here and you'll use it on every money you ever hold.

Stock is how much of a money exists right now. Flow is how much gets added to it in a year. Divide stock by flow and you get the stock-to-flow ratio: how many years of new production the existing supply represents. A money with a ratio of sixty would take sixty years of digging to double. A money with a ratio of two doubles every two years.

The book's word for a high ratio is hardness. A hard money can't be flooded: no producer, however motivated, can add enough in a year to dilute the holders. Gold's ratio has sat around sixty for a century because the mines are slow. That's why it won, in the book's telling, and why it held for millennia.

The second idea is what hardness buys. Salability across time means a money's ability to carry value from today to a future date without leaking. A money that holds lets you sell this year's work to your future self. A money that doesn't, taxes the sale. Lesson 1.4 measured that tax on the dollar; this book names the property it's a tax on.

The third idea is the big one and the contested one. Time preference is how much you favor now over later. The book argues hard money lowers it: when the unit keeps, people save, plan, invest for decades, build cathedrals. Soft money raises it: spend now, the unit is melting. The claim is that the money shapes the civilization, not just the prices, and it's the claim every critic aimed at.

Now the candidate. Bitcoin's supply schedule, from lesson 1.5, is fixed in code: a set number of new coins per block, cut in half every four years. So its stock-to-flow rises on a timetable, forever. The book's arithmetic says it passed gold's ratio around the 2024 halving and will keep climbing. The desk checked the arithmetic, on the board below, and it holds.

What the ratio doesn't measure is the other half of last week's book: speed, settlement, and whether the ledger can carry the world's transactions. Ammous answers that with a second layer, briefly. Alden spends a third of her book on it. Read them together and the argument is complete; read either alone and it isn't.

The desk doesn't take a ratio on faith from a book. It computes it.

Gold. The World Gold Council counts two hundred and twenty two thousand six hundred tonnes above ground at the end of the second quarter, and a record three thousand six hundred and seventy two tonnes mined in 2025. Flow is one point six five percent of stock. Ratio: about sixty one. The book's number, confirmed.

The dollar, using M2 as the stock. Twenty three point two trillion in July, up one point one nine trillion from a year earlier. Flow is five point four percent of stock. Ratio: about nineteen. The book's point, confirmed: the reserve currency is softer than gold by a factor of three, and the committee can change the flow any month it likes.

Bitcoin. Twenty million eighty two thousand coins at last count, with about a hundred and sixty four thousand new ones a year at the current reward. Flow is zero point eight two percent of stock. Ratio: about a hundred and twenty two. Twice gold, and rising on a schedule nobody can amend.

On the book's own measure, computed from this month's numbers, the thesis is arithmetic: the coin is the hardest money on the table by a factor of two, and the gap widens every four years.

Now the line the book was published into. From the 2017 high through the 2018 collapse, the 2021 high, the 2022 collapse, the 2025 high, and this week near seventy six thousand seven hundred.

Hardness didn't stop any of those falls. That's the reader's first lesson and the book's own caution: a high ratio says nothing about the price next year. It says something about the supply in 2140.

The incentive map, applied to a book. Who wrote it? An economist who holds the asset and built a career on the argument. Who gains if the thesis holds? Holders, and the author's readers most.

Who paid for the overreach? Readers who took the cultural chapters as economics and the economics as a price forecast. Who's still paying? Anyone who bought the coin as a trade because a book told them it was money.

Here's the reveal, and it's the desk's, not the book's. The stock-to-flow argument is sound, and it's the reason the coin belongs in the money course and not the trading one. But the book's weakest chapters are the ones its readers quote most, and its strongest tool is the one they use least. Steal the ratio, skip the sermon.

A digital tycoon reads a library book to take one tool. From this one the office takes the ratio and leaves the rest.

First, compute the ratio for everything you hold as money. Cash: the M2 flow, five percent a year and the committee's to change. Gold: sixty one. The coin: a hundred and twenty two. Write those three numbers next to the three positions and update them once a year. The book's whole argument is in the column.

Second, don't let the ratio become a price target. It measures supply. Price is supply against demand, and demand is the part nobody's book controls. The chart above is the ratio's own warning.

Third, read it in order. The history in the first half is worth the price of the book. The cultural chapters are one man's view, marked as such by his own reviewers; read them as a stance, not a finding. The Bitcoin chapters are the case; read them, then read Broken Money's last third, then decide.

Our paper fund reads it by its rules, and scores itself against holding Bitcoin alone, which is the book's thesis turned into a benchmark: if the desk can't beat the hardest money by owning businesses and stocks, the book was right and the desk should just hold the coin.

• The Bitcoin Standard: The Decentralized Alternative to Central Banking, Saifedean Ammous, Wiley, 2018. Published in 39 languages by the author's count. Wikipedia; saifedean.com.
• Reviews: Reason, July 2018 (Jim Epstein), praising the explanations and criticizing "rants" attributing society's cultural failings to government-issued money; the Cato Journal, Fall 2018, a similar criticism; the Central Bank of Barbados, 2021, criticizing the gold-standard history and "the lack of empirical evidence for his claims." Wikipedia.
• Gold above ground: 222,600 tonnes at end Q2 2026. Mine production 2025: 3,672 tonnes, a record, up 1 percent. Flow over stock: 1.65 percent; stock to flow about 60.6. World Gold Council.
• M2: $22,025.5 billion in July 2025; $23,218.0 billion in July 2026; the year's flow $1,192.5 billion, 5.4 percent of stock; stock to flow about 18.5. FRED.
• Bitcoin: 20,082,553 coins in circulation on September 10, 2026; reward 3.125 per block since April 20, 2024; about 52,560 blocks a year at ten minutes each; annual flow about 164,250 coins, 0.82 percent of stock; stock to flow about 122. Lesson 1.5's ledger and arithmetic.
• Coinbase bitcoin (CBBTCUSD): $19,650 on December 16, 2017; $3,183 on December 15, 2018; $76,665 on September 10, 2026. FRED, as in lesson 1.5's ledger.
• "Sold more than a million copies" is reported in secondary sources and not confirmed on the author's page; the lesson says "by most accounts" for that reason.