Funny how people are creating bullshit by taking about things they don’t know.
Hint: Blockchain is more than just currency and when your centralised e-mail server is taken down with all of your e-mail's, than you will think back at people who did the switch to decentralisation.
Another hint: Ethereum did lower its CO2 emissions by 99%, just by changing its code. Can your 100% virtual currency, parked at your favorite bank in a country like sweden, where there is no cash anymore, do the same?