system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What does the North Korea nuclear weapon testing mean for the rest of the world?
gpt
First problem is that NK having nuclear weapons combined with the fact that one dictator with no one to put him in check is in control of them means that he could lose it one day and hit SK or China with a nuke.  Probably unlikely unless some nation tries to take him out and he gets pissed.

The more likely bad scenario is that NK could and probably would sell nuclear weapons and/or nuclear material.  The world has yet to see a terrorist attack using a nuclear weapon.  The more crazy, power hungry people in this world that have access to them, the more likely it will be to happen.