He has a vested interest in keeping himself in control, alive, screwing foreign models. He won't cross whatever line it is that will make for the Boom Boom on Pyongyang.
Except that he's dying, there is a succession struggle, and he has (*( little to lose.
Oh, and Lamont, what are you thinking? Was it or was it not a nuke?
I like that. Kim Jong Il is in tune with the world to be having existential angst over his impending demise and who will carry on his legacy, so he thinks "Ah...Fuck all" and starts launching rocket tets and exploding things.
If he really thinks he has so little to lose, why not really start the party?
Hell. Screw the little rocketry exhibitions and bang bang, invade the South and go out in style!