Blockchain: This is the secure, decentralized ledger that records all transactions and makes cryptocurrencies trustworthy. Bitcoin (BTC): The first and most well-known cryptocurrency created in 2009. Often called "digital gold," it’s mainly used as a store of value. Ethereum (ETH): Another major cryptocurrency that enables “smart contracts” — self-executing contracts with terms directly written into code. Wallet: A digital place to store your cryptocurrencies. Examples include MetaMask, Trust Wallet, and exchange wallets like Binance or Bitget. Gas Fees: Transaction fees paid to process activities on some blockchains, especially Ethereum. Staking: Locking your crypto to help secure a network and earn rewards, similar to earning interest in a bank.