Despite the care you have, if you're dead it doesn't matter.
I know that we also wanted to take care of our Bitcoins; to protect it from the hackers and prove that it is ours with private keys on our side. But the problem here is that this huge explosion is an accident, or the carelessness of the people with that tons of amonia stored there.
We can protect our Bitcoins and other altcoins from hackers, from scammers, but we can't always protect ourselves from what will happen.
Agree, I don't really agree with the OP saying we have to store our paper wallets and cold wallets from different locations. Isn't it dangerous too? Especially if you don't regularly visit the places you keep it. And I also agree that this is an accident. We are all surprise by it. But well if this strat works for him, then its good. However, it is still not safe from other circumstances too.
I think there's really no safe strat for us, all we need to do is do everything we can to safely store it, whether to our most trusted people, or to our most secured accounts in the internet. Find the best strat that will work for you.
Guys and Gals, you are too focused on a scenario where you are at the primary location where this accident happened. Let's take this accident as a example.. They report that over 250 000 people lost their homes, but just over 100+ lost their lives. (4000+ injured)
What if you are one of the injured people or if you were not at home when it happened. If this happened at night, there would have been more people at home and probably a lot more people might have lost their lives. The facts are that 250 000+ did not die and their houses are gone... How many of them had bitcoins/Private keys stored in their houses?
Also, let's say this is your Private key :
L4hVMF5PXJ pyy9w2r3k
NvyPiDhaPcbd P5uh2Bp
G63cmgp647PZnL - You can store the section in
Bold in different locations without people having access to the sections that are not in
Bold, so they can do nothing with those sections. (Only you know how to put the puzzle together when all sections are together)
Keep one copy with the whole thing somewhere safe, if you are paranoid that you would forget how to put it together or if you lose one location.