Well, for a complete Bitcoin outage there must be a complete outage of electricity and communications in large parts of the world. That would require an extreme form of world war - much more heavy than WW2. It's realistic in a nuclear war, and then we're doomed anyway
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But for massive conflicts the best option to make Bitcoin survive are
mesh networks of Wi-Fi routers that replace the current internet service providers (as nearly everyone in industrialized countries own a wi-fi router or an Android phone they can be organized quite quickly).
And for electricity, solar or wind energy for Bitcoin users. There are countries like Germany where already a high proportion of houses have photovoltaic panels, so that's not an unrealistic option.
Correct, and the predictions of those people who are always keep on saying that bitcoin will die would come true at last, and we are also going to die if this World War 3 would really happen in the future, but let's hope that it will not. We are living on the Computer Age right now, so the World War 3 will be like a World Massacre, many people will die, many houses will be ruined because of the bombing that will happen, exchanging of guns fire, and above all of that, this world will become like a hell, fires everywhere.
And because of this destruction and situation, bitcoin will obviously die, because there will be no one, who is not insane to think bitcoin first rather than himself during a War, only greedy and insane people will do that.
