The North Korea we know, with its God-king dynasty and intense insularism, is thoroughly the creation of Kim Jong-Il. He manipulated himself into power, usurping his father. Truly, one of the greatest modern talents in bastardry. Kim Jong-Un is a kid who was mollycoddled his whole life and is now in charge of a country that he is far from the most powerful character in. If North Korea will survive, it will likely not be with the Kim dynasty at the helm. I would put money on a coup by those closest to Kim Jong-Un, followed by China immediately stomping on them. I'm just an armchair NK enthusiast though so don't take that as gospel.