Crypto vs blockchain: what is the difference?

Crypto vs blockchain is a question about two things that are often mixed up. A blockchain is the record-keeping technology, and a cryptocurrency is one thing you can record on it. Every major cryptocurrency runs on a blockchain or similar ledger, but not every blockchain has a cryptocurrency.

Is blockchain the same as crypto?

No. The US National Institute of Standards and Technology (NIST) describes blockchains as tamper evident and tamper resistant digital ledgers. They run on a distributed network instead of one central database, and they usually have no single authority such as a bank or government in charge. Once a transaction is published under normal operation, it cannot be changed.

A cryptocurrency is a digital asset, such as bitcoin or ether, that lives on that ledger. NIST notes that blockchain technology enabled the development of many cryptocurrency systems. In other words, crypto is an application, and blockchain is the infrastructure underneath. For the mechanics, see how blockchain works and how cryptocurrency works.

What is the difference between bitcoin and blockchain?

Bitcoin is both a currency and the network that moves it. Its own blockchain is the ledger that records every bitcoin transaction. The 2008 white paper by Satoshi Nakamoto describes a peer-to-peer electronic cash system that timestamps transactions by hashing them into an ongoing chain of proof-of-work. The paper talks about blocks and the longest chain, but the single word "blockchain" became popular later.

So when people say "bitcoin's blockchain," they mean the ledger, and when they say "bitcoin," they usually mean the coin. The guide on whether crypto is the same as bitcoin covers a related mix-up.

Can a blockchain exist without cryptocurrency?

Yes. Public blockchains like Bitcoin and Ethereum use a native coin to reward miners or validators and to pay fees, which keeps the network open to anyone. Private or permissioned blockchains work differently.

Hyperledger Fabric, an open-source enterprise blockchain, is one example. Its documentation says it can use consensus methods that do not require a native cryptocurrency, because the participants are known to one another and can rely on contracts and existing trust. Companies use these networks to share records, such as supply chain data, among approved members. The guide on public vs private blockchains explains the trade-offs.

Why does the difference matter?

Separating the two helps when reading news. A company announcing a "blockchain project" may have nothing to do with buying or selling a token. On the other hand, a token sale is a crypto activity, with its own risks and rules, even if it is marketed as blockchain technology.