godo interesting idea but in all likelyhood the event you are concerned with here would be so devastating that traditional fiat or crypto asstes become a moot point of concern. Things like food, water, medicine, and any form of fuel will be far more critical after any such event. Some estimates put the death toll in the US from a major state sponsored or solar emp event to be 90% of the population gone / deceased by the end of the first year. This is due to many factors but the challenges of just surviving will be far more pressing than the recovery of long lost financial assets that have no value after such an event. Best to plan for basic survival than worry about what financial assets one has lost.