> I believe that most of money consumed by the financial system actually goes back into the economy. Some bankers buy sushis, then sushi chefs buy gasoline, then oil drillers... and so on. BitCoin tends to waste energy irrecoverably.

Bitcoin is best technical solution we have for an existing societal problem. As soon as better technical solution will be created (e.g. proof-of-stake which can be relied upon), Bitcoin will be modified to use it. And Bitcoin will continue to operate with lower costs - burning less energy.