BTCSOURCE-LED ANSWER
What is Bitcoin and how does it work?
A beginner-friendly explanation of Bitcoin, transactions, nodes, mining, ownership and the 21 million supply rule.
Bitcoin is an open monetary network and also a digital unit transferred on that network. Wallets authorize payments with cryptographic keys, nodes independently verify the rules, and miners use Proof of Work to order valid transactions into blocks. No single company controls the ledger, and no one can change the supply alone.
Bitcoin is both a network and a unit
The network is a public protocol run by many independent computers. Bitcoin is also a divisible unit recorded by that network. A payment transfers the ability to spend particular transaction outputs; it does not send a file from one phone to another.
Wallets sign and nodes verify
A wallet manages keys and constructs signed transactions. Full Node verify signatures, available outputs and consensus rules before relaying or accepting them. A wallet can show a balance without holding coins inside the device.
Mining orders valid transactions
Miners compete with Proof of Work to publish blocks. Their work makes recent history costly to replace, but nodes still reject blocks that create too much bitcoin or violate other consensus rules.
Ownership means satisfying spending conditions
Bitcoin does not maintain named account holders. Each unspent transaction output carries a locking condition. A valid spend supplies the required cryptographic evidence, usually a signature. Control therefore follows keys and script conditions rather than a company login.
Consensus is repeated local verification
Each Full Node verifies received blocks against the rules it runs. Nodes using the same rules reject invalid history and choose the chain with the most cumulative work among valid branches. Mining helps choose between valid histories, while validation determines what a node will accept as Bitcoin at all.
Bitcoin does not guarantee price appreciation, privacy or protection from user error. Its narrower promise is a set of transparent rules that participants can verify independently.
01Who controls Bitcoin?+
No single party does. Developers publish software, miners propose blocks, businesses choose services and users decide which rules their nodes accept.
02Is Bitcoin stored in a wallet?+
No. The network records spendable outputs; the wallet manages the keys and data needed to control them.
03Can Bitcoin work without the internet?+
Signing can occur offline, but broadcasting transactions and receiving current network state requires a communication path to the network.