If there's a natural disaster cutting off electricity for days, trading bitcoin should be least of your worries really. Priorities man.
Made me chuckle, but i guess OP has a point here. I mean if you're place was destroyed after a hurricane you kinda need the means to buy food and water for your family. If you're a heavy crypto currency user then this woukd be a hassle especially if networks and electrical services are down. I guess, you should've prepared before a disaster?