Bitcoin is money software, not a company
Bitcoin does not have a CEO, customer support desk, or central database. Thousands of independent computers run software that agrees on the same transaction history. That history is stored on a blockchain.
The asset is called bitcoin, usually written BTC. The network is also called Bitcoin. People use the word for both, which can be confusing at first.
Bitcoin was introduced by Satoshi Nakamoto in a 2008 whitepaper and launched in January 2009. The design was a response to a basic problem: how can strangers agree who owns digital money without trusting one central company?
Why people talk about the 21 million supply cap
Bitcoin's code limits total supply to 21 million coins. New BTC enters circulation as a block reward paid to miners. Roughly every four years, that reward is cut in half in an event called a halving. The most recent halving was in April 2024, reducing issuance to 3.125 BTC per block.
This fixed-supply design is why many people compare Bitcoin to digital gold. The comparison is imperfect, but the core idea is scarcity. No central bank can create more BTC to respond to a crisis.
Scarcity alone does not guarantee value. Bitcoin also needs demand, liquidity, security, and social belief. For a broader explanation, read what gives crypto value.
Mining is how Bitcoin orders transactions
Miners collect pending transactions into blocks and compete to solve a costly proof-of-work puzzle. The winning miner adds the next block and receives the block reward plus transaction fees. This makes rewriting history extremely expensive.
Mining is energy-intensive by design. Supporters argue that energy cost is what secures the network. Critics argue that the energy use is wasteful. Both points matter. Bitcoin chose security through physical cost rather than through a central validator list.
What Bitcoin is used for in 2026
Bitcoin is used as a long-term store-of-value bet, a settlement network, collateral in some crypto markets, and a way to move value across borders. It is less common for everyday shopping because the base chain is slower and fees can rise when the network is busy.
In traditional finance, spot Bitcoin ETFs approved in the United States in January 2024 made it easier for investors to get price exposure through brokerage accounts. ETF exposure is not the same as holding BTC in your own wallet, but it changed how institutions access Bitcoin.
Bitcoin risks beginners should know
- Volatility: Bitcoin can fall sharply even during long-term bull markets.
- Custody: Losing your private keys can mean losing the coins forever.
- Regulation: Rules differ by country and can change.
- Fees: Transaction fees can rise during congestion.
- Scams: Bitcoin's name is often used in fake investment schemes.
If you are considering buying, start with how to buy crypto for the first time and keep the first purchase small.
FAQ
Who controls Bitcoin?
No single company or government controls Bitcoin. Developers write software, miners secure blocks, nodes enforce rules, exchanges provide liquidity, and users decide what software and services to use.
Can Bitcoin supply go above 21 million?
Changing the supply cap would require broad agreement across the network, and it would violate one of Bitcoin's central value propositions. In practice, a change like that is considered extremely unlikely.
Is Bitcoin the same as crypto?
No. Bitcoin is one cryptocurrency. Crypto is the broader category that also includes Ethereum, stablecoins, tokens, and many smaller networks.