> Proof-of-work incentivizes cheap & renewable energy investment. Energy will become cheap even for malicious actors, so bitcoin hash difficulty will have to g

> Proof-of-work incentivizes cheap & renewable energy investment. Energy will become cheap even for malicious actors, so bitcoin hash difficulty will have to go up in order to keep it costly for them to fake transactions. Which means energy usage goes up too. There's no way to avoid "work" in a proof-of-work scheme.