Not 100% that I have the details right, but there was maybe a story about the collapse of the USSR that demonstrates how even mundane technology can tip the balance in fragile regimes; supposedly, middle-class Russians used fax machines to communicate coded messages to their anti-regime friends, and to print information pamphlets for the people without a fax machine.
There were many other things that helped to tip the balance, like western radio stations and smuggled goods, but ultimately the big reasons why it fell was because:
1. Its economy was wrecked by the Cold War.
2. There was a lot of inside tensions, as many nations wanted to form their own countries.
3. The soviet leadership was willing to dissolve it.
North Korea is different, their economy is much worse, yet their leadership shows no willingness to change, they would rather die than give up their power.
So, Bitcoin there can only improve individual lives at best, it can't be the power that could topple that regime.
sure. what I meant was that small, innocuous tools can make a significant difference in adding more straw to the camel's back
but whether that was the last piece of straw before the camel quit is a bit hard to say 
