What was the first cryptocurrency? Bitcoin explained
Bitcoin was the first cryptocurrency, released in January 2009 by the pseudonymous Satoshi Nakamoto, and it still runs on a public blockchain.
Vahe HakobyanEditor-in-chief
Updated Oct 5, 20263 min readFact-checked
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- Miners confirm on-chain payments on a public blockchain.
- People send value, hold bitcoin as an asset or pay merchants.
- Prices swing hard, and a lost key means lost coins.
- Bitcoin is pseudonymous, not fully anonymous.
- Later coins added smart contracts and other features.
Bitcoin was not issued by a company or a government. Its rules live in open software that anyone can run, and each on-chain payment is written into the Bitcoin blockchain, a public ledger anyone can read. Later projects copied the idea and added features of their own.
How does Bitcoin work?
The network keeps one public ledger that holds every transaction ever processed. Computers around the world check each new batch of payments and agree on their order. No bank or government approves a transfer.
- Miners confirm on-chain transactions. Specialized computers race to solve a cryptographic puzzle, and the winner adds the next block.
- Mining pays a reward. That winner receives new coins plus the fees paid in the block.
- Digital signatures prove control. Each payment carries a signature that matches the sending address.
- The rules sit in software. A change takes effect only when enough of the network runs it.
How do people use Bitcoin?
You reach Bitcoin through a wallet, which holds your private keys. A private key is the secret that lets you move coins, so whoever holds it controls them.
- Send value. A payment usually confirms within minutes.
- Hold it as an asset. Some people keep bitcoin for years.
- Pay merchants. Some businesses accept it, though most US shops do not.
What limits does Bitcoin have?
The price swings hard, and crypto has crashed repeatedly, including in 2011, 2013 through 2015, 2017 through 2018, and 2021 through 2023. When many people send at once, confirmations slow and fees rise. Lose your key and the coins are gone, with no support desk able to reverse a payment.
How is Bitcoin different from later coins?
Bitcoin was built for one job: sending and storing value. Later projects reused the blockchain idea and added features, most notably smart contracts, which are programs that run on a network.
Frequently asked questions
No one knows. It is a pseudonym used by the person or group who wrote Bitcoin's first specification and proof of concept, then left the project in late 2010 without revealing an identity.
Namecoin, launched in 2011, is often named as the first alternative coin. It reused Bitcoin's code to build a decentralized domain registry.
Yes, buying, owning and selling bitcoin is legal here. The CFTC treats it as a commodity and the IRS taxes it as property, while other regulators apply different labels.
