Every argument about Bitcoin eventually runs aground on the same objection: it is a nice theory, but it does not actually do anything. Digital gold for speculators, a chart to gamble on, a libertarian fantasy with no bearing on real life. I have heard this objection for years, and I have come to believe it is exactly backwards. Bitcoin is not a theory waiting to prove itself. It is already doing concrete, measurable, often surprising work in the world — preserving the savings of people whose governments have failed them, moving value across the planet for fractions of a cent, stabilising electrical grids, and heating buildings with the waste of its own computation.
I am writing a second book about it. It is called The Cathedral Problem, a loose sequel to The New Architecture that turns to the question the first book set aside: not how we organise ourselves politically, but how an economy and a society would actually function if money were limited, deflationary, and beyond the control of any state. It begins where the argument is strongest — not with theory, but with what Bitcoin already does — and only then asks what a whole civilisation built on that foundation could become.
The premise is a wager about lineage. Bitcoin was the first real-world realisation of Friedrich Hayek’s Denationalisation of Money — money taken out of the hands of the state — and, just as importantly, the first instance of genuinely hard, sound money in human history: fixed, unprintable, beyond any sovereign’s reach. But the first is not necessarily the last. Hard money at global scale may yet require developments we have not built — refinements, layers, institutions that do not exist today. Bitcoin, in this sense, is the altar: the first sacred, immovable thing set in place. Global hard money is the cathedral still to be built around it.
Part One: What Bitcoin Already Does
Before any vision of a hard-money future is worth a sentence, the foundation has to be laid in fact. So here are five things Bitcoin does today, in the world as it is.
It preserves savings where the currency is collapsing. For most people reading this, money holding its value is something you take for granted. For hundreds of millions — in Argentina, Turkey, Nigeria, Lebanon, Venezuela — it is a luxury they have never known. When your national currency loses half its value in a year, every month you hold savings is a month you are robbed. Bitcoin offers a way to store the fruit of your labour in something no central bank can debase. That is not speculation for them; it is financial self-defence. It moves money across borders for almost nothing: the Lightning Network sends value globally, in seconds, for a fraction of a cent, where the remittance system skims an average of ~6% off money sent to families who need every cent.
It has been the best-performing major asset of its era — said carefully: Bitcoin is extraordinarily volatile, has suffered drawdowns of seventy percent and more, and past performance guarantees nothing. None of this is financial advice. But the historical fact stands. It balances electrical grids: a miner is a load that can switch on and off in seconds and run anywhere, making it the ideal buyer of energy that would otherwise be wasted — surplus wind, flared gas, curtailed midday solar. In Texas, miners shut off in seconds when demand spikes and return their power to the grid. And it heats buildings with its own waste: every computation a miner performs ends as heat — the same second law of thermodynamics explored in Without Proof of Work — and a growing number of operations capture it to warm district-heating systems, greenhouses, and swimming pools, displacing fossil-fuel heat.
The objection was always that Bitcoin does nothing. But it is already preserving savings, moving money for nothing, balancing grids, and heating homes. The theory works. We are standing in it.
Part Two: What an Economy Built on This Could Become
Now the book turns from what is to what could be. If hard money — fixed in supply, unprintable, holding or gaining value over time — became the foundation of an entire economy rather than an escape hatch from a broken one, what would change at the root?
An economy that builds cathedrals again. Under inflationary money, saving is punished: every year you hold cash it buys less, so the rational move is to spend now, borrow heavily, and consume before your money decays. This is the hidden engine of the throwaway economy — pressure we mistake for human nature but is in fact a response to the money. Reverse it. Make money that gains value over time, and the rational move becomes to defer, to build quality that lasts, to think in decades. Economists call it low time preference, and it is civilisational: a society that saves can build cathedrals again — structures that outlast their builders.
The end of needless consumption. So much of what we produce and discard — fast fashion, planned obsolescence, mountains of things bought to be thrown away — exists because the money pushes us to consume rather than preserve. Under hard money the logic inverts: why buy the disposable thing when the money you would spend is itself an appreciating asset and the well-made thing lasts a lifetime? A deflationary economy is not a poorer one. It is a less wasteful one. Hard money and ecological sanity may point in the same direction.
The end of war financed by the printing press. This is the moral heart of the book. Great wars are not paid for with taxes — no population would vote for the bill. They are paid for by printing money: the state creates currency from nothing, spends it on the war, and extracts the cost invisibly, later, through the inflation that erodes everyone’s savings. It is taxation without consent. Hard money closes this door. If a state cannot print, it must pay for war the honest way — out of taxes its citizens can see — and the moment the cost becomes visible, war becomes vastly harder to start. Hard money does not make war impossible. It makes the financing of war honest, and that is a profound brake on the appetite for it.
What It Means
The foundation is already poured. The reason to take the hard-money future seriously is not a clever argument — it is that the pieces are already working. Bitcoin is preserving savings in collapsing economies right now; Lightning is moving remittances for nothing right now; miners are balancing the Texas grid and heating Scandinavian homes right now. You do not have to believe a prediction; you only have to look. And the deepest claim is that our economic behaviour is not our nature: we are told humans are naturally short-termist, consumerist, wasteful — but the thesis here is that this reflects the money, not the species. Change the money to something that rewards patience, and the behaviour changes with it.
This issue assembles the monetary threads from across this blog — proof-of-work’s thermodynamic security, the leaderless block lifecycle, the agentic economy, and crypto as a neutral settlement layer between states — into one frame. The honest hard problems remain (the deflationary-spiral fear, credit and lending without elastic money, how investment is financed when no one can print); wrestling them is the substance of the book. The New Architecture gave the political half of the post-fiat world. The Cathedral Problem is the economic half.
Flight Log — Dispatch from Altitude
Aviation is one of the last industries that still builds cathedrals. An aircraft type is designed to fly for decades — the airframe I command was engineered to outlast the careers of the people who built it, maintained to a standard that assumes it will still be carrying passengers long after I retire. The whole culture runs on the long horizon: maintenance schedules measured in decades, training pipelines that take a lifetime to mature, safety refined patiently across generations. We build to last because lives depend on the things we build not failing.
I have always felt the contrast between that culture and the throwaway world around it — the phone built to slow down in two years, the appliance cheaper to replace than repair, the garment worn twice and discarded. A disposable aircraft is a contradiction in terms. And I have come to suspect the difference is not that aviation is special. It is about what happens when you are forced to take the long view: when the horizon is decades, you build cathedrals; when it is quarters, you build landfill.
The thesis of the book is that money sets that horizon for an entire civilisation. Soft money, decaying in value, pushes everyone toward the short view — spend now, consume now, discard now. Hard money, holding its value across time, pulls the horizon outward and rewards the patience that lets you build things meant to last. The medieval masons who began a cathedral knew they would die before it was finished. They built anyway, because the value they were storing — in stone, in craft, in faith — would not decay before the work was done. We lost that horizon when we lost hard money. The book is about whether we could get it back. We know how to build cathedrals; we did it for centuries, and in a few corners of the world we still do. The question is whether the right money could let us do it everywhere, for the long future, again.