Bitcoin is the first decentralized cryptocurrency, created in 2009 by Satoshi Nakamoto. It allows secure peer-to-peer transactions without intermediaries.
Bitcoin operates on a Proof of Work (PoW) blockchain. Miners solve complex math problems to validate transactions and secure the network.
Halving is an event happening roughly every 4 years where the reward for mining new blocks is cut in half, reducing the supply of new bitcoins.
Bitcoin is pseudonymous. While real names aren't used, all transactions are public on the blockchain and can be traced to wallet addresses.