To me this looks fake or some type of publicity stunt.
But lets say its true. This dude fifty is true bully ass nikka
How you going to talk about a dude on the radio first talking about you don't like the guy(and the way does business). Then when he goes on the radio and says your not culturally relevant and haven't had a huge song since "I get money" (facts). You want to start a fight.
nikka literally loves having altercations. Something really sick about that. Dude is to old for this shyt.
Shyt on someone and then get mad when they say something back brehs