The stuff between China and India is probably serious. But, the two have gone to blows before without any wide ranging effects. It is worrisome. Some of my friends in the national security space noted it is an escalation and we should keep tabs on it.
The North Korea blowing up the building is a big flashy attention getter, but is not a big change in policy or worrisome. That is just normal shit for them. Kim's sister is taking on a more prominent role I read, so this may be her way to make a statement.
I'd be more worried about the China-India flareup.