I don’t think a lot of plebs really believe until big corp. like Black Rock fully integrate it.
But the question is somewhat difficult also, because it already reached us and them. You could say us first, because obviously the origin story of Bitcoin tells us that.
But if you mean who will put the last puzzle peace in. It will be rich people and big corporations. Cause they have the resources to make Bitcoin as big as it can be. If it’s their intention, is another question. But as you already said, it’s inevitable.