So burning electricity on running a cryptocurrency is not right, but burning electricity on running servers for Facebook or user tracking is all right? If that's the case, who's the arbiter of what's "too much" power for a use case?
If that's not the case, how do you propose to enforce that all use cases use less electricity, and how do you punish those who use too much?
If that's not the case, how do you propose to enforce that all use cases use less electricity, and how do you punish those who use too much?