Well, no electricity, and no internet connection would kill BTC for sure! You wouldn't be able to make any transactions without these.
Other issue can be all the countries in the world ban BTC, but this will not restrict it's circulation, as no internet connection do!
I agree if we dont have electrixity and internet bitcoin will die because it digital coin.
I am pretty sure about this. But let think wider, when electricity is shut down. Every aspect of this realm may be turn in disaster. In few country, there is so many Radioactive Nuclear Reactor that have coolling control system depents on electric. When electric is down, coolling system is disable. Huge Massive Explode begin to appear