But in a way, couldnt he buy the most population Instances like Lemmy.World? Is that a possibility?

Unlikely, but either way, I’m not registered there and neither are you. There’s already many of us hesitant of their size and are quick to recommend making new communities somewhere else.

If that were to happen many people would make accounts elsewhere.

To reiterate, this place isn’t own by anyone. I’m confident we would all just move to other instances.