Just remember, he has a history of making questionable admissions while concealing key facts (i.e. the magical >50% reduction of his debt with no explanation), so take anything he says with a grain of salt. I certainly miss him, and I wish people weren't quite as direct with their bullying, because like many before him, Unk had an uncanny ability to derail literally every possible opportunity for progress in his career purely by himself. My guess is that he finally ran out of money to make overproduced and overpriced music videos, and he knew that admitting that kind of thing would simply reignite the "at least a million in debt" memes.
That said, I don't think he will permanently leave the rap scene; his ego would never allow him to do that.