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!
as far as I know the bitcoin archive are in for conditioning,hard drive so no electricity, no internet not kill it. However it will not be traded, only exists in the form of worthless. no electricity, no internet, the world will going back to Neolithic