Whichever new project becomes more green in proof of work mining it's never going to take over bitcoin, the reason why because rules today isn't because of its PoW algorithm, there is more to that success of BTC in general, everyone keeps talking about chia coin but sooner or later it will become a pain in the ass
In my opinion, even if the project is advocating to be more on the green side. Still, its success will depend on the chosen use case and how strong is their development team on achieving their goals. Any project can claim they are green but to what extent? And how sustainable are their objectives?