Bitcoin (BTC)
Bitcoin is the first and largest cryptocurrency by market cap. Created by Satoshi Nakamoto in 2009, it pioneered decentralized digital money.
Key Bitcoin Concepts
Halving Events
Block reward cuts every 210K blocks. Next halving 2028.
Lightning Network
Layer 2 scaling. Instant, low-fee transactions.
Bitcoin ETFs
Spot BTC ETFs approved 2024. Institutional access.
Mining
Proof of Work. Energy-intensive security model.