The tin Tuga eats from has been getting smaller for years. Not dramatically — nobody announces it. It went from 100g to 85g, the recipe was "improved", the price stayed roughly the same, and at some point the pack of twelve quietly became a pack of ten.

Tuga has not noticed, because cats measure dinner by whether the bowl is full, not by what it weighs.

Most people hold their savings the same way. They check whether the number in the account is the same or bigger and conclude nothing has been taken. This article is about the difference between those two measurements, and why one number in Bitcoin's design does more work than all the rest.

1. The Number That Cannot Move

There will only ever be 21 million bitcoin. Not "probably", not "unless there's a good reason". The issuance schedule is enforced by every node independently, and changing it would require essentially everyone running the software to agree to devalue their own holdings.

This is the part outsiders find hardest to believe, because every other monetary rule they have encountered was a policy — set by people, revisable by people, revised whenever circumstances made revision attractive. And in fairness, circumstances usually did.

Bitcoin's supply is not a promise made by an institution. It's a property of a system that thousands of strangers verify for themselves, which is the only kind of monetary promise that has ever survived contact with an emergency.

2. What "Inflation" Actually Feels Like

The official figure is an average across a basket. What people experience is the shrinking tin: the same money buying slightly less, in ways that are individually too small to complain about and collectively enormous over a decade.

Currency debasement is not usually theatrical. It's not wheelbarrows. It's a slow transfer from people holding money to people issuing it — a few percent a year, compounding quietly, invisible to anyone measuring in the currency being diluted.

That's the trick worth understanding: if you measure your savings in the thing being diluted, dilution is undetectable. The bowl looks full. It's the tin that changed.

3. Why Fixed Beats Merely Scarce

Gold has worked for five thousand years because increasing its supply is hard. But it isn't fixed — when the price rises, mining becomes more profitable, more gold gets produced, and supply expands to meet demand. The scarcity is a cost curve, not a ceiling.

Bitcoin's is a ceiling. If demand doubles, no additional bitcoin appears. The difficulty adjustment ensures that throwing more machines at the problem produces the same 3.125 BTC per block, not more.

That is the genuinely new thing here, and it's worth separating from all the noise around price. A supply that cannot respond to demand has never existed in a monetary good before. Whether that turns out to be a good idea is a live question. That it's novel is not.

4. The Honest Objections

I'd rather give you the arguments against than have you meet them unprepared.

• "A fixed supply discourages spending." The standard economic critique: if money gains value, people hoard it and demand collapses. The counter is that people buy things they need regardless, and that a modest incentive to save is not obviously a civilisational problem. Reasonable people genuinely disagree here.
• "Lost coins make it deflationary beyond the plan." True. Millions are likely gone forever — early keys, dead drives, forgotten passwords. The effective supply is smaller than 21 million and shrinks over time. Divisibility handles it mechanically (each coin is 100 million sats), but it is a real deviation from the stated design.
• "It's too volatile to be a store of value." Currently, yes. A thing that can halve in a year is not what your grandmother means by savings. The bull case requires believing volatility falls as adoption widens — which is a thesis, not a fact, and should be held as one.
• "The 21 million is arbitrary." Correct. Any number would have been. What matters isn't the figure — it's that it's fixed and verifiable, not that it's 21.

Anyone who presents this topic without those four is selling, not explaining.

5. What It Means Practically

You don't need to accept the maximalist case to use the idea.

The practical version is simply this: hold some portion of your savings in something whose supply nobody can expand — including the people who benefit from expanding it. Not everything. A portion sized so a 70% drawdown is survivable and a 5x is meaningful.

That's not a bet on price. It's a hedge against the tin quietly shrinking, held in the one asset where you can verify the size of the tin yourself, on your own machine, without asking anyone.

The Point

Tuga will never notice the tin. She has no way to measure it, no memory of last year's portion, and no vocabulary for the difference. The bowl is full, so the world is fine.

You have the tools she lacks. You can count the units, verify the schedule, and check that nobody has quietly improved the recipe. Whether you use them is up to you — but you cannot claim, as she can, that you had no way to know.

Measure your savings in something nobody can print. Check the tin, not the bowl. 🐾⚡