This looks more like some piece of FUD that tries to tie Bitcoin and North Korea together to paint it in a bad light and justify banning it later. If you think about it, it doesn't make sense, because you need a huge amounts of money to sustain you economy, and it's impossible to move them secretly. The US would quickly find North Korean coins and warn exchanges about them. Next, Bitcoin is a payment system, but you need to sell something to get it, so NK has to produce something, but they can't because their economy is barely functioning. And the last point, NK is supported by China and Russia, everyone know that, so there is no need for Bitcoin to sustain NK.
Agreed, NK stories related to Bitcoin could easily be BS propaganda at a time when Bitcoin is already having a bad week.