Following latest round of sanctions even their biggest banks are now not able to transact internationally. North Korea is the only truly independent county. It is also independent from international banking oligopoly. They have nothing to lose. Introducing bitcoin as a settlement unit in their international economic relations is an exceptional opportunity for this country!
I think that you don't understand much about North Korea.
I was several times in South Korea and know situation first hand.
North Korea is not last independent county, it's cruel dictatorship regime.
People are brainwashed and starving.
Only selected a few people have right to use Internet.
Most people don't have even computers.
There is no way that they will use for currency something they can't control.
Even if they use, only 110-20 people will be able to buy or sell bitcoin
No way!
Why don't you guys read initial post carefully? Nowhere I'm suggesting mass adoption of bitcoin in North Korea! I'm just suggesting that if North Korean government can't use their banks to receive payments for the exports of government controlled enterprises, they can simply use bitcoin instead of US$ as remittance currency!
As far as the "cruel dictatorship" goes, I think there are US allies that are much more cruel dictatorships. For instance, Saudi Arabia. In 2015 more people were beheaded in SA than on the Islamic State held territories in Iraq and Syria. So, please don't use this propaganda cliché. Nobody will be impressed.