Luffy gained Gear 5 in Wano Arc while battling Kaido ... For instance, in the battle against Rob Lucci, Lucci was able to get a pair of goggles from absolutely nowhere. Later on, when he fought ...

At the moment, Luffy's greatest power is Gear 5th. It has enabled Luffy to take on the likes of Kaido, Kizaru, and Lucci. In One Piece ... people who do not follow manga/anime know about him.