Me and my school friend was talking about our theory's on the ending of the series and we both found our ideas interesting but also realized that they can be combined together.
My theory was that the straw hats would realize that the One Piece isnt a phisical thing, the One Piece is the friendship between the nakama, the adventure's theyve embarked on and the skills theyve learnt. This is what Gol D. Roger treasured as the One Piece and left it behind for people like the straw hats to aquire.
My friend thought that the series is just going to get so epic that Oda simply cant make better material (lol) so in the end Luffy would become satisfied with what he has, get sick, and hand himself in, and smile until the end just like Gol D. Roger.
We both agreed with each others opinions and we decided that the ending would be my theory, then his theory afterwards (since my theory didnt include what would happen next and his theory didnt include a follow-up).
So how do you think the story will end?… Or you could just deny the ending and say it will go on forever (which wouldnt suprise me)...