What Backs Bitcoin? The Question That Misunderstands Money

The short answer is that nothing backs bitcoin — no government, no company, no commodity. The longer and more useful answer is that this is the wrong question, because nothing backs the dollar either, and has not since 1971.

Money does not need to be backed by something else. That is a habit of thought left over from the gold standard. What money needs is a set of properties. Understanding those properties is the key to understanding why bitcoin is money at all.

The Dollar Is Not Backed By Anything

Until 1971, US dollars were redeemable for gold at a fixed rate. In August of that year, that link was severed, and it was never restored. Since then, the dollar has been backed by nothing but the expectation that other people will accept it and that the government will demand it back in taxes.

This is not a criticism unique to the dollar. Every major currency today is a pure fiat currency, backed by nothing tangible. They function because they have — for now — the monetary properties people need. When those properties erode, so does the currency, as the long history of failed fiat monies shows.

What Actually Makes Something Money

Economists since Carl Menger have identified the properties that let a good serve as money. A good money is:

• Scarce — its supply cannot be easily expanded
• Durable — it does not rot, rust, or decay
• Divisible — it can be split into small units for small payments
• Portable — it can be moved across distance at low cost
• Fungible — one unit is interchangeable with another
• Verifiable — its authenticity can be checked

Gold earned its monetary role by scoring well on most of these for thousands of years. Its weakness was portability and divisibility at scale. Fiat currency solved portability by abstracting money into ledger entries — but at the cost of scarcity, because those entries can be created without limit.

Where Bitcoin Fits

Bitcoin is the first money that scores highly on all of these properties at once. It is absolutely scarce, capped at 21 million units. It is perfectly durable, being information. It is divisible to one hundred-millionth of a coin. It is more portable than any physical good, moving anywhere in minutes. It is verifiable by anyone running a node, without trusting a third party.

If you insist on the language of backing, then bitcoin is backed by the energy and computation that secure it and by the mathematical certainty of its supply schedule. But the deeper point is that a money with the right properties does not need an external guarantor. It stands on its own.

Gold was chosen as money because of what it is. Fiat is used as money because of who enforces it. Bitcoin is money because of what it does.

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