Blockchain Beginner
A blockchain is a shared record of transactions that many computers keep in sync, rather than a single company holding the books.
Records are grouped into "blocks", and each block is cryptographically tied to the one before it — so rewriting old history would mean redoing everything since, which is effectively impossible on a large network. Because independent participants each hold a copy, no one party can quietly change the ledger.
It is the foundation under Bitcoin, Ethereum and most cryptocurrencies. Different blockchains strike different balances between decentralisation, speed and cost.
Related terms
Bitcoin
Bitcoin is the original and biggest cryptocurrency: a decentralised digital money capped at 21 million coins.
BeginnerBull Market
A bull market is an extended stretch of rising prices and optimism.
AdvancedDAO
A DAO (decentralised autonomous organisation) is a group run by token-holder votes and smart contracts instead of a traditional management team.