How exactly will THAT happen? BTC isn’t a company or a corporation, it’s in no position to build server farms, web networks, basically any of the hardware and corporate organization functions necessary to become the web. Who will “overbuild” the renewable capacity, on whose nickel, on whose property or land? Bitcoin may use less of the finance infrastructure…thank goodness for that given that it doesn’t actually DO anything outside of luring speculators and using valuable and limited resources.