Luffy's current peak power is Gear 5, his awakened devil fruit form enhancing his abilities significantly. Gear 6 is unlikely ...

Is Eiichiro Oda foreshadowing a grand reveal of Loki's power in One Piece by connecting his design to Egyptian Gods?

Fans can expect Akainu to be defeated by Luffy by the end of the series.

The tumultuous events in the Egghaed arc showcases how haki is central to defeating formidable enemies on the Grand Line.