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Proof-of-Work vs. Proof-of-Stake: Which Is Better?
Proof-of-work and proof-of-stake are consensus mechanisms, or algorithms, that allow blockchains to operate securely. These consensus mechanisms keep blockchains secure by allowing only genuine users to add new transactions. They work by making potential participants prove they have dedicated some resource, like money or energy, to the blockchain.
Proof-of-stake vs. proof-of-work: Differences explained
Though Bitcoin's (BTC) transaction history is securely sequenced using proof-of-work (PoW), it consumes a lot of electricity and the number of transactions it can handle at once is limited.