After the events of the Wano Country arc, Luffy has now become a Yonko of the Sea, and, as is evident in the story right now, one of the strongest individuals in the New World. Defeating Kaido certainly meant that Luffy had now risen to a completely new level of power as well as infamy. This was rightfully reflected in his bounty, which shot up to 3 billion berries after the events of the Onigashima War.