Quick answer
Bitcoin is a peer-to-peer monetary network that records transfers on a public proof-of-work blockchain.
What is Bitcoin?
Bitcoin is an open network for sending and receiving value without a central ledger operator. Participants use cryptographic keys to authorize transfers, while miners compete to add blocks and nodes verify the rules.
The useful way to approach this term is to separate its definition from the assumptions people often attach to it. In crypto, the same word can appear in a protocol rule, a user interface, a market-data label, or a marketing claim. Check which layer the explanation is describing.
Why does bitcoin matter?
Knowing what Bitcoin is prevents a common category error: BTC is the asset, while Bitcoin is the network and rule set that records ownership. The distinction matters when checking addresses, custody, confirmations, and fork claims.
Concrete example
See it in a real situation
If Alice sends 0.01 BTC to Bob, her wallet creates a transaction, signs it with her private key, and broadcasts it. Miners may include it in a block; nodes then verify the signatures and the inputs before accepting the state change.
Common misconceptions
What this term does not mean
- Bitcoin is not a company with a customer-service department; it is an open protocol.
- A Bitcoin wallet does not contain coins in the same way a physical wallet contains cash; it manages keys used to authorize transactions.
Related terms
Sources and further reading
Definitions are written for education and checked against the sources below where relevant. A source can explain a protocol or rule without endorsing every product built around it.