If there's a natural disaster cutting off electricity for days, trading bitcoin should be least of your worries really. Priorities man.
You wont really bother or to problem this thing first when theres an electricity outage for sure you would find to secure first your family,loved ones on how to live without electricity rather than minding on how you would able to trade with bitcoins. This is just really a non sense question after all because not only bitcoin trading would be affected but all the things which been powered by electricity would be gone too.Imagine a life without energy for sure you would struggle on daily living knowing that we are already living on this convenient world because of gadgets or things which uses electricity.If its gone then were fucked up.
I agreed with your opinion, that's the best thing to do incase no electrcity, they can't do nothing but to secure his family first.
Do not mind my words fellow and try to get my point. In order to live, we need air, water, food, clothes and at last shelter. Electricity does not come in any of the basic needs.
If there wont be any electricity that does not mean the family will die out but in case of bitcoin rather whole of the cyber world, it will come to an end and that is really painful even when imagining. Without electricity, everything that needs battery or charging will be gone.
In this era of modern technology, electricity is also one of the basic needs and there is no way that we can survive without having electricity. In case, there remains no electricity in this world, then things will be very much difficult for us to manage especially when it comes to that of crypto currencies as we do need to have an electricity and internet connection in order to perform transactions.