Too Long; Didn't Read
The concept of proof-of-work (PoW) pre-dates Satoshi Nakamoto’s white paper by around 15 years. Satoshi was the trailblazer of using PoW in a decentralized peer-to-peer environment. However, PoW is a limiting factor in the scalability of a blockchain network. Delegated Proof of Stake (DPoS) consensus method is a kind of representative democracy where token holders vote for the nodes that will run the network. DPoS has proven to overcome scalability challenge, but fewer nodes also form Achilles heel.