Luffy is one of the strongest characters in One Piece right now and he will most definitely continue to grow as the series hurtles towards its end. One Piece is currently in the Final Saga, and with the conclusion of Egghead Island, a much bigger arc in Elbaf is now at hand. Oda has been teasing this arc for decades now, and fans know that this story arc is most certainly going to be one of the very best, if not the best in the entire series.