The energy usage of Bitcoin is proportional to the price, it doesn't grow without bound as you seem to be saying here. Miners compete for a fixed reward, it doe

The energy usage of Bitcoin is proportional to the price, it doesn't grow without bound as you seem to be saying here. Miners compete for a fixed reward, it doesn't make sense for new miners to enter the system if the rewards already are distributed to the point that they just cover the costs.