Gear 5 isn't the final power-up for Luffy. Gear 6 is still a possibility in One Piece.

Luffy, the eccentric captain of the Straw Hats, has evolved tremendously throughout the One Piecestory, thwarting evil despite the paradoxical nature of his pirate group. Oda’s unrefined protagonist ...

With the One Piece series moving towards the ending, who are the major characters Luffy will or are likely left to face in ...

Monkey D. Luffy has continued to grow more and more powerful, especially thanks to his Gear 5 power-up. With the constant progression of abilities in One Piece, it does beg the question if there will ...