Realistically if North Korea does collapse. While it would be a disaster, a lot of people are going to want to get that country under stable control both to maintain the peace and to take advantage of their rare earth minerals. You know those materials that enable you to have faster, smaller, smarter phones, North Korea has them and has been selling it to China as it's main export ( also currently the mines are not as successful as they should be). Their collapse affects China and from that the World. Which is why they were and still are given aid.