Ethereum's PoS also pays only a tenth as much reward as Bitcoin, as a percentage of total supply. According to whattomine.com, with an electricity cost of $0.0

Ethereum's PoS also pays only a tenth as much reward as Bitcoin, as a percentage of total supply. According to whattomine.com, with an electricity cost of $0.03/kWh your cost is about 2/3 of the Bitcoin reward. Combined with a 10X higher reward, that means a Bitcoin miner with that electricity cost gets about three times as much return on investment, as a percentage basis, as an Ethereum staker. That's money they can reinvest in new mining equipment.