Genuinely, does anyone really know how much of a threat North Korea really is to world peace? My assumption is that South Korea are under immediate threat, sin

Genuinely, does anyone really know how much of a threat North Korea really is to world peace? My assumption is that South Korea are under immediate threat, since North Korea could almost throw a bomb over the fence, but how dangerous are they DPRK really, away from all of the propaganda and sabre-rattling (on both sides)? I can't see through all the smoke and mirrors presently. Is there anyone out there who is more enlightened on the subject?