Bitcoin’s limited supply: Why only 21 million BTC exist

Bitcoin is often called “digital gold” because of its built‑in scarcity. Unlike traditional currencies, which central banks can print at will, Bitcoin has a fixed maximum supply of 21 million coins. This hard cap is one of the key features that makes Bitcoin different from fiat money.

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Why Bitcoin’s supply is limited

Bitcoin’s supply limit is written into its code. The network issues new coins through a process called mining, where miners use computing power to verify transactions and add new blocks to the blockchain.

To control supply, Bitcoin’s creator designed a schedule that reduces the rate of new coins over time. Roughly every four years, an event called the “halving” cuts the reward given to miners in half. This process will continue until the maximum of 21 million coins is reached, expected around the year 2140.

This predictable and finite supply makes Bitcoin resistant to inflation caused by currency printing. It also underpins Bitcoin’s reputation as a scarce digital asset.

What happens after all 21 million bitcoins are mined?

Once all 21 million coins have been created, no new Bitcoin will be issued. Miners will still be incentivised to maintain the network, but their reward will come entirely from transaction fees rather than block rewards.

This transition will ensure that Bitcoin continues to function securely as a peer‑to‑peer network, even without new coins being generated.

Bitcoin as a store of value

Some people view Bitcoin as a store of value during times of high inflation or money printing, but its price remains volatile and influenced by market demand. Anyone considering digital assets should first understand the risks involved.

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