>Biggest problem about PoW coins, and that's something that everybody working on it knows, or should know, is that the need of power is steadily bigger each yea

>Biggest problem about PoW coins, and that's something that everybody working on it knows, or should know, is that the need of power is steadily bigger each year PoW is wasteful by design. The more hash power you throw at the network, the more difficult the PoW becomes. Any efficiency gains necessarily have to go towards more hashing, instead of maintaining the same level of work at a lower power draw.