Cryptocurrency staking is locking your digital assets (crypto) to a blockchain network to help validate transactions and secure the network. In return, you earn rewards—typically new tokens or transaction fees. Staking is now a $100B+ industry; Ethereum alone has $30B+ staked. For individual investors, staking offers 4-10% annual yields—higher than traditional savings accounts. For businesses and institutions, staking operations manage billions in assets and generate substantial revenue. The skill involves choosing validators, monitoring performance, understanding risks, and optimizing for tax efficiency. Staking income is passive once set up but requires active management to optimize. Individual holders can earn $100-1,000+ annually by staking modest amounts. Institutions and staking services earn substantial fees: 5-15% of staking rewards for managing validators. Understanding staking is valuable for crypto careers, DeFi professionals, and anyone interested in digital asset management. Unlike trading, staking doesn't require constant attention or market timing; it rewards long-term holding.