Follow
But proof of stake (PoS) requires well, a stake, so a massive upfront investment you need to keep frozen, which again prioritises the largest and wealthiest players. For example, the proposed stake for mining Ethereum is 32 ETH which is around 64'000 GBP today. For PoW you also need investment in the form of mining devices and cheap electricity, but that can be scaled, at least in theory.