Capitalizations Index – B ∞/21M
bitcoin transactions are often considered final after 6 confirmations. This standard balances security and practicality, reducing double-spend risk as blocks build on top of the initial transaction.
Despite popular belief, no single entity controls bitcoin. Power is distributed across miners, node operators, developers, and users, whose consensus secures and governs the network.
A 51% attack occurs when a single entity controls most mining power, enabling them to manipulate transactions, double-spend coins, and undermine trust in a blockchain network.
bitcoin transaction confirmations measure how deeply your payment is embedded in the blockchain. More confirmations generally mean higher security against reversals.