You have not shown a real scenario how bitcoin could work without an energy armes race.
The power consumption is NOT arbitrary: Everyone who owns bitcoins has to be motivated to keep bitcoin alive. More people having bitcoin means more people need to make sure that mining is happening.
The second point is, bitcoin mining requires a certain amount of distribution to work as intended which leads to: you need a critical mass of people doing the mining as you can't just trust 3 people mining it for you and you trusting them. Especially as bitcoin is often mentioned as being 'free'. Therefore you can't just go to a bank or country and let them mine it with nearly no power consumption.
The third point is: Mining has to be motivational enough and therefore it will hover between being worth to do so in countries like USA (for distribution reasons) and gambling (gambling provides high margin with high risks and i think that could be a good UPPER resource consumption limit).
Forth: Bitcoin mining always needs an incentive which makes it competitive: If everyone can mine unlimited and there is no factor to determine who can mine more, than it just doesn't work anymore.
We now have a system which ALWAYS consumes resources and its critical to understand 'consume'. That resources is gone. Otherwise your proof of work wouldn't work anymore.
A global economy is easy able to destroy something like bitcoin: China can just ban it, countries can put pressure on other countries like USA and partners do with North Korea. No country has a benefit of allowing bitcoin. A country has control over their currency and they like to keep the control.
"the new world economy" what? Do you think we have our current financial system just for fun and we all move to bitcoin? Our current financial system is build and has grown over a long period. We all LIKE that current system. I like to be able to go to my bank and show my passport and get my money. I like to know that untaxed money is harder to hide. I like the knowlwedge that you can't transfer high amount of money from left to right without an external party looking over it for money laundring. Those systems are beneficial for every normal human being.
Don't throw in garbage statements like "old man yells at cloud". Either argue or don't.