Newcomers asking "What is blockchain?" usually meet cryptocurrency in casino cashiers, news headlines and adverts, often before they know what it is. This guide covers the basics in plain words: what the term means, how it differs from other digital money, how buying works, what can go wrong, why prices lurch around, and what a blockchain actually does. It explains each part and recommends nothing to buy.
What is cryptocurrency? It is digital money that exists as entries in a shared public record rather than as notes or bank balances. Ownership is proved with cryptographic keys: the holder of the private key for an address can sign a transfer of the coins recorded there. Most cryptocurrency has no central bank behind it, so its value comes only from what people will pay. Bitcoin was the first; thousands followed, from coins with their own networks to tokens issued on someone else's, and stablecoins designed to track a traditional currency.
What is blockchain? A blockchain is a shared ledger that records transactions in blocks, each one linked to the block before by a cryptographic fingerprint called a hash, so altering an old entry would break every link after it. How does blockchain technology work in practice? Computers across the network keep copies of the ledger, check each new transaction against its rules, and agree on the next block, through mining on Bitcoin or staking on Ethereum. No single party controls a public chain, though the technology alone makes no project built on it honest.
Digital currency vs cryptocurrency is mostly a question of scope. Digital currency is the broad term for any money held and moved electronically: a bank balance, the balance in a payment app, or a central bank digital currency issued and run by a national central bank. Cryptocurrency is one kind of digital currency, defined by cryptography and usually by a ledger that many computers share. A central bank digital currency may use encryption too, yet it is managed centrally and is not normally called crypto. Asking who issues a currency, and who keeps its records, tells the two apart.
Digital money recorded in a shared public ledger, owned through private keys and usually issued without a central bank.
It carries less risk inside a platform that holds the coins in escrow and settles disputes; strangers in public chat groups are a common route to fraud.
Usually on an exchange that is licensed or registered where the buyer lives, after an identity check, paying by card or bank transfer.
A shared ledger of transactions in linked blocks, copied across many computers that check each new block against the network's rules.
No. Digital currency covers any electronic money, including bank balances and central bank digital currencies; cryptocurrency is one kind of it.