In traditional systems, records can be edited, reversed, or overwritten by an authority. Bitcoin works differently. Once a transaction is confirmed on the network, It becomes part of a permanent ledger secured by cryptography and distributed verification. It cannot be changed retroactively without redoing the computational work of the entire chain that follows it. This property is called immutability. Immutability is not a feature layered on top. It is a structural rule built into the protocol. It is what allows value to move without relying on institutional trust, because the record itself cannot be rewritten. For anyone evaluating digital financial infrastructure, Immutability is one of the most important concepts to understand. #Bitcoin101 #BlockchainSecurity #DigitalInfrastructure #CryptoEducation #FintechSystems