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!
not just bitcoins that die if the electricity is turned off and the internet network removed. even the world will become chaotic, bitcoin will actually live even if electricity and internet die but access to use bitcoin missing, yaa this is actually our fear all, because I am sure 80% in this forum only have income through forum
Bitcoin still exist, but it'll completely make bitcoin stopped or can't active. all the hashpower is gone, none of transaction will be confirmed, even sending transaction is impossible, that mean in practical use, once internet destroyed, bitcoin will be gone.