What happens in the event of a world catastrophe, like a terrorist attack, plague, or meteor strike, killing key people, limiting travel, and otherwise inhibiti

What happens in the event of a world catastrophe, like a terrorist attack, plague, or meteor strike, killing key people, limiting travel, and otherwise inhibiting recovery of all these distributed tokens and keys? Security is not only protection from being hacked, but protection form loss. If Bitcoin is to survive political, economic, and environmental turmoil, shouldn't we worry about our coins being stored with such potentially fragile recovery plans?