Folks it's not crazy to think he will stay at UK, it's also not crazy to think he may very well have some ambition to take another crack at the NBA.
I think the safe bet is that he will stay until Brad graduates and wins at least one more title. After those two things happen I think we can expect him to start entertaining NBA options.
That's not to say he's going to hop on the first bus out of town, because I believe he is waiting for a very specific opportunity. I've said before and I'll say again, that he is not going to leave for anything less than full control of the basketball operations nor will he take just any gig. It's going to have to basically be second in command only to the owner in NY, Miami, LA (clips or lakers), Boston. Maybe the NBA expands and he looks at the opportunity of really starting something with a new franchise.
Also, I wouldn't be totally shocked if he continued his revolution/crusade in some capacity. He's never been shy with his ideas, criticisms, philosophies etc...Maybe the thought of being athletic director has crossed his mind. He can also talk with the best of them, so the booth isn't totally out of the question. He'd be the Gruden of basketball, and with that platform he could also continue his mission.