One Piece: Will There Be A Gear 5th Luffy?

gamerant.com:

Monkey D. Luffy's Gomu Gomu no Mi power has been one of the most interesting aspects of his character as, over the years, he's learned to use it in incredible ways. While the Devil Fruit itself doesn't seem much useful given that its only power is to turn Luffy into a rubber man, Luffy finds unique ways to utilize its powers and grow stronger.

So far, one of the most intriguing additions that Luffy has made to his powers is the usage of «Gears,» which simply refers to different modes of power that he accesses by making use of his Devil Fruit. In One Piece's Enies Lobby, Luffy came up with Gear Second, which increases his power by pumping blood through his body faster, and Gear Third, which sees him inflate his bones to generate more power. After the timeskip, Luffy managed to create Gear Fourth, which made use of inflated muscles and Haki to generate power. Interestingly, it's been seven years since Luffy's last major Gear power-up and it's entirely possible for something new to come up soon in One Piece's Wano Country arc – Gear Fifth.

One Piece: Is Luffy Finally Yonko Level?

One of the biggest questions when it comes to speculating about Luffy's Gears is whether there is even going to be a Gear Fifth in the first place. After all, Luffy has just managed to improve his control over Gear Fourth and might not be ready for the next step just yet. While there is some truth to that thought, it's entirely possible for Gear Fifth to exist, depending on what fans think Gear Fifth will do. Luffy's gears work in unique ways and make full use of his Devil Fruit power every single time. With Gear Second, Luffy takes advantage of his rubber body to sustain an incredibly high blood pressure making blood flow much faster in his body,