Natural disasters must only occur in a few countries, it is unlikely that earthquakes will occur simultaneously throughout the world, while those who use crypto are people all over the world, so crypto will not be affected by it
we dont know for sure about that. what if solar flare destroy our technologiy advancement this past centuries? what if climate change affect our internet? anything could happen to crypto actually but its decentralized nature make it more resilient against such natural disaster but honestly, we should have some kind lf backup plan if the worst case happens. i think honestly were too dependant on jnternet