// GLOSSARY -- BLOCKCHAIN & CRYPTO FUNDAMENTALS

What is Bitcoin?

1 min read Updated

Bitcoin is the first decentralized cryptocurrency, created by Satoshi Nakamoto in 2009, operating on a proof-of-work blockchain as a peer-to-peer electronic cash system and digital store of value.

WHY IT MATTERS

Bitcoin introduced blockchain technology to the world. Its core innovation: a decentralized ledger where participants agree on transaction history without a central authority. Proof-of-work mining secures the network, and a fixed supply of 21 million coins creates digital scarcity.

As the largest cryptocurrency by market cap, Bitcoin serves primarily as a store of value and a hedge against monetary policy. Its scripting language is intentionally limited — optimizing for security over programmability.

Bitcoin's UTXO model, Lightning Network for scaling, and conservative upgrade approach make it fundamentally different from smart contract platforms like Ethereum.

FREQUENTLY ASKED QUESTIONS

How is Bitcoin different from Ethereum?
Bitcoin optimizes for security and sound money — limited scripting, fixed supply, proof-of-work. Ethereum optimizes for programmability — Turing-complete smart contracts, proof-of-stake.
What is Bitcoin mining?
Expending computational energy to validate transactions and produce new blocks. Miners compete to solve cryptographic puzzles; the winner adds the next block and receives the block reward.
Is Bitcoin used for payments?
Primarily as a store of value. The Lightning Network enables faster, cheaper payments, but Bitcoin's main use case remains long-term value storage and large settlement.

FURTHER READING

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