A lot of people are talking about how the manga should end after that etc..
Idk dude, it's not impossible to make something good out of it. I just hope they actually manage to kill Muzan, if that happens then the author can properly conclude this part of the story and move on to whatever else is to come without stretching it too much.
I believe that many people are scared of this not being the end because of well known over stretched mangas, like Naruto (specially Boruto), Fairy Tail and a few others, but this doesn't means all long mangas have to be bad.
Anyway, i also believe this could be the end, i'm just saying that if it isn't, it will not be necessarily bad.