The first and largest cryptocurrency by market cap. Bitcoin introduced the concept of a decentralised peer-to-peer electronic cash system secured by proof-of-work mining. It remains the dominant digital store of value.
Proof of Work (PoW) is the original blockchain consensus mechanism, made famous by Bitcoin. Miners compete to solve computationally expensive puzzles to validate transactions and add blocks to the chain. The difficulty automatically adjusts to maintain consistent block times.
Litecoin is one of the earliest Bitcoin forks, created by former Google engineer Charlie Lee. It processes transactions 4x faster than Bitcoin and uses the Scrypt hashing algorithm. Often called digital silver to Bitcoin's digital gold, it has one of the longest track records in crypto.
Bitcoin Cash is a fork of Bitcoin that increased the block size to enable more transactions per second and lower fees. It emerged from the 2017 scaling debate and positions itself as the original vision of Bitcoin as peer-to-peer electronic cash.
A blockchain is a distributed, append-only ledger of records (blocks) chained together cryptographically. Each block contains a cryptographic hash of the previous block, ensuring immutability. Bitcoin introduced the first practical implementation in 2008, solving the double-spend problem without a central authority.
Cryptocurrency mining is the process of validating blockchain transactions and adding new blocks by solving computationally intensive mathematical puzzles. Miners are rewarded with newly created cryptocurrency. Bitcoin mining has evolved from home CPUs to industrial ASIC farms consuming gigawatts of power.
Satoshi Nakamoto is the pseudonymous creator of Bitcoin and the author of the Bitcoin whitepaper. Their true identity remains one of the greatest mysteries in technology. Satoshi mined approximately 1 million Bitcoin in the early days before disappearing from public life in 2010.
The Bitcoin halving is a programmatic event that occurs every 210,000 blocks (approximately every 4 years) and reduces the block reward paid to miners by 50%. It is hardcoded into Bitcoin's protocol and is a key driver of its deflationary supply model.
Cryptocurrency regulation encompasses the growing body of laws, rules, and enforcement actions governing digital assets. Approaches vary enormously — El Salvador made Bitcoin legal tender while China banned all crypto. The EU passed comprehensive MiCA legislation in 2023.
The Lightning Network is a Layer 2 payment protocol built on top of Bitcoin. It enables near-instant, near-free Bitcoin transactions by creating off-chain payment channels between parties. Only the opening and closing of channels are recorded on the Bitcoin blockchain.
Wrapped Bitcoin (WBTC) is an ERC-20 token on Ethereum representing Bitcoin at a 1:1 ratio. Each WBTC is backed by real Bitcoin held in custody by BitGo. It enables Bitcoin holders to participate in Ethereum's DeFi ecosystem without selling their BTC.