After Holloway wins, he should go to LW. He beats everyone at FW. He will dominate his next fight too.
But he will probably still be there even though he beat almost everyone. That is difference between Conor and the rest. Conor is always trying to fight better and bigger fighters everytime, going for belts, trying to get more and more.
I don't doubt that Conor might go to boxing next, and then he takes a fight for the WW belt. That is how great he is. The most exciting fighter out there doesn't give a shit.