Restaking

Restaking lets you reuse crypto you've already staked to secure a blockchain so it also secures other services, like oracles or bridges, at the same time. It matters because it can earn you extra yield on the same capital, but it also stacks new risks: if one of those extra services gets hacked or slashed, your original stake can take the hit too. EigenLayer popularized the idea on Ethereum, letting people restake staked ETH (or liquid staking tokens like stETH) to back things like data availability layers, earning added rewards on top of normal staking yield, currently often single-digit percentages, in exchange for taking on that added slashing risk.