Topic
GeneralBeginnerBoth are consensus mechanisms that decide who adds the next block without a central authority. Proof of work spends real-world energy on a hashing puzzle (Bitcoin); proof of stake locks up coins that can be slashed (Ethereum since 2022).
#consensus#mining#staking
EthereumIntermediateA layer 2 runs on top of a base chain like Ethereum for cheap, fast transactions while inheriting its security. Rollups execute off-chain, then post compressed data back to Ethereum — optimistic ones use fraud proofs, zk ones use validity proofs.
#bridges#consensus#scaling
EthereumIntermediateLiquid staking gives you a token for staked ETH, like stETH or rETH, that keeps earning rewards while usable in DeFi. The main risks are contract bugs, slashing, the token trading below its ETH value, and stake centralization.
#consensus#defi#security
BitcoinBeginnerEvery 210,000 blocks, about every four years, Bitcoin's new-coin subsidy to miners halves, capping supply just under 21 million. It slows issuance, squeezes miner revenue, and shifts more of the security budget onto fees.
#basics#consensus#mining
