It’s hard to say, even if I know more details, it would be so unprecedented situation that I think nobody could say for sure what happens.
The best you can do in these times when there is still less certainty in the things we were used to is to trust yourself that you know what to do.
I think it could last for not more than 1 week, for 1 year we would back to stone ages. Anyway, we must have silver, gold and cash for these type of events
1 day in blackout would be catastrophy anyway. I see that more crypto decentralized less pain would experience, rather than btc. Each coutry would cope differentrly with electricity or internet to restore
I would be much more concerned about the effects it would have on society rather than what it would do to the price of ADA and other crypto. We run on the internet, look at how intertwined human existence now is with the instantaneous transfer of data we have over the internet.
The scenarios you propose are wide ranging and varied and the overall effect will depending their size, severity, and how long they exist for.