With a country like North Korea I dont think that we can realistically hope that change will come from the inside like it did when the Iron Curtain fell. All dissent, of any kind, is ruthlessly suppressed, there are tens of thousands in forced labour camps, a large proportion of the population is undernourished and there is no access to news of the outside world. Most of the population has been brought up believing that the whole world is out to kill North Korea, led by the imperialist Yankee dogs. China doesnt want North Korea to collapse as that would bring a western leaning, capitalist country onto its doorstep, so what may happen, is that NK will continue to slowly haemmhorage (?). The risk is that as a final throw of the die, when it realises it is collapsing it decides to go all out and attack Japan, SK or the USA - god forbid!