To be sincere with you, I always think of this situation whenever I come across those numerous comments on wallet safety. We can only think of where our wallets are after we've survived a war. No one thinks of where their money or property is in a war. No matter how tight you think you've made the safety of your wallet you can only have access to your place of safety for it if it's not affected by the incidence of war after the war or is anyone going to have sheets of papers on them as they journey for safety. I bet they will get dispossessed of such at first check point.

The only place to keep such would be in an email. Just pile up everything secret in one's email with a remarkable password. If one can remember the email password, one can easily open it after the war to assess whatever that's kept there but is the email even a better option with all the hacks we see every time?