Yes, eventually I believe proof of work will be replaced by other protocols such as proof of stake. This is already the case on many chains. The cost for proof

Yes, eventually I believe proof of work will be replaced by other protocols such as proof of stake. This is already the case on many chains. The cost for proof of stake is minimal, as in you can run a full node on a raspberry pi. Check out Tezos, Cardano, et al.