Even if the chances of WWIII occurring are as low as 1 in 10, it is important to have an insurance policy in place. Things like the internet, hard drives, and electronics would not likely survive a nuclear attack. The key factor is that out of a million people, there are probably not many that have a hard drive inside of a lead box or similar protective measure.
I have an archive of decades of movies, tv shows, all of Wikipedia, various large gpt models, and a literature collection of a large number of books. There are a few things that should be done in the event of a WWIII:
#1) Sending a copy of the archive to various random people across the world via an 18TB hard drive. Your job is to protect the contents of this archive. If you don't have the funds for a lead box, bury it in a cheap box that is at least 10 feet underground. Feel free to make a copy of the archive yourself.
#2) Start archiving as much valuable information as possible and securing it.
#3) Someone could start a Bunker Backup DAO, where you could invest and be in a bunker in the event something does occur. It could be one per location. Some of the funds could be used to create as much of an ecosystem with the purpose of restoration in the event of an all-out nuclear war, like a billion books, literature, media, seeds, tools.
(Adding more if I come up with any more ideas, feel free to add some below)
