My guess is he somehow ends up giving it to that person that was hunting for the underground place or that that person ends up finding it after he leaves it where it is.
Why be a king of a place where there's no longer any residents? 🤔 there's probably some other perks attached but I think it'd be a bother to take the crown
I feel like that crown is cursed, or if you put the crown on and become the new king you're cursed ( that role of king is cursed I mean). That's why that great devil smiled.