Every dollar, euro, and yen in circulation exists because a central authority decided to create it. Bitcoin is different. Its supply was fixed at 21 million coins before the first block was ever mined, and no person, government, or committee can change that number. This fundamental difference between Bitcoin and fiat money is at the heart of why Bitcoin was created — and why it continues to matter.
What Is Fiat Money?
Fiat money is currency that has value because a government says it does. The word "fiat" comes from Latin, meaning "let it be done." Unlike gold or silver, fiat currencies are not backed by a physical commodity. Their value rests on trust — trust in the government that issues them and the central bank that manages their supply.
For most of modern history, this system has worked well enough. But it has a critical flaw: there is no hard limit on how much money can be created. When governments need to fund spending beyond what taxes provide, they can — and regularly do — print more money.
The Problem With Unlimited Supply
When the supply of money increases faster than the supply of goods and services, prices rise. This is inflation, and it is a persistent feature of every fiat currency system.
Consider the US dollar. Since the Federal Reserve was established in 1913, the dollar has lost over 96% of its purchasing power. A dollar in 1913 bought roughly what $30 buys today. This erosion is slow enough that most people do not notice it year to year, but over decades it devastates savings held in cash.
The problem accelerated dramatically in recent years. In response to the 2020 pandemic, central banks around the world created trillions of dollars in new money. The US M2 money supply increased by roughly 40% in just two years. The result was the highest inflation in four decades, with prices for food, housing, and energy surging worldwide.
This is not a new phenomenon. History is littered with more extreme examples — the hyperinflation of Weimar Germany, Zimbabwe in the 2000s, and Venezuela in the 2010s, where currencies became essentially worthless. These are cautionary tales about what happens when the power to create money has no constraints.
Bitcoin's Fixed Supply
Bitcoin's answer to this problem is elegant in its simplicity: there will only ever be 21 million bitcoins. This cap is enforced by the protocol itself, not by any institution or promise.
New bitcoins enter circulation through mining, where miners receive a block reward for securing the network. This reward is cut in half approximately every four years in an event called the halving. The first reward was 50 BTC per block; as of 2024, it is 3.125 BTC. You can track the countdown to the next halving on the Bitcoin Time homepage.
This disinflationary schedule means that the rate of new bitcoin creation is constantly decreasing. By approximately 2140, the last fraction of a bitcoin will be mined, and no more will ever be created. The supply curve is completely transparent and predictable — anyone can verify it by running a node.
Store of Value vs Medium of Exchange
The fixed supply has fueled one of the longest-running debates in the Bitcoin world: is Bitcoin better suited as a store of value (like digital gold) or as a medium of exchange (like digital cash)?
The store of value argument says that Bitcoin's scarcity is its most important property. Just as gold is valuable partly because it is rare and difficult to mine, Bitcoin is valuable because its supply is fixed and cannot be inflated. Proponents of this view — common in the BTC community — argue that Bitcoin should be "held, not spent," and that other solutions (like the Lightning Network) can handle everyday payments.
The medium of exchange argument points back to the original whitepaper, which described Bitcoin as "a peer-to-peer electronic cash system." From this perspective, scarcity is important, but Bitcoin was designed to be used — for payments, commerce, and the kind of micropayments that the internet desperately needs. What good is digital gold if it costs $5 in fees to move it?
BSV: Fixed Supply and Usable Money
BSV shares the same 21 million supply cap and the same halving schedule as BTC. The monetary policy is identical — they are, after all, both Bitcoin. Where they differ is in the vision for how that money should be used.
BSV's approach is that both properties — store of value and medium of exchange — are not only compatible but necessary. Money that cannot be spent easily is not very useful as money. By maintaining low transaction fees (often a fraction of a cent) and high throughput through large blocks, BSV aims to be the version of Bitcoin that you can actually use daily while still benefiting from the fixed supply.
This means you can send a few satoshis to pay for a piece of content, settle a large business transaction, or store value long-term — all on the same chain, with the same monetary policy, without being priced out by fees. You can explore applications built on this model on the BSV Ecosystem page.
Fiat's Counterargument
It is worth acknowledging the other side. Central bankers argue that the ability to adjust the money supply is a feature, not a bug. In a recession, increasing the money supply can stimulate economic activity. In a crisis, governments can inject liquidity to prevent financial system collapse.
These are real benefits in the short term. The question is whether the long-term costs — persistent inflation, currency debasement, boom-and-bust cycles fueled by easy money — outweigh them. Bitcoin's fixed supply is a bet that sound, predictable money is ultimately better for humanity than money controlled by political institutions with short-term incentives.
The Bigger Picture
The debate between Bitcoin and fiat is not just about technology or economics. It is about who controls money and what rules govern its creation. Fiat money gives that power to governments and central banks. Bitcoin gives it to mathematics and code.
Neither system is perfect. Fiat money is flexible but prone to abuse. Bitcoin is rigid but transparent. What Bitcoin offers — and what fiat cannot — is a monetary system where the rules are known in advance and cannot be changed by anyone, no matter how powerful.
To understand the events that shaped this monetary revolution, explore the full Bitcoin history timeline, or use our Bitcoin Age Calculator to see how Bitcoin's age compares to the major fiat currencies of the world. For a closer look at how Bitcoin began, read about the genesis block and the mysterious figure behind it all.