Now, assuming you do have back ups in at least two separate locations (as you should), what are the chances of your main wallet and all your back ups (i.e. 3 separate locations) all being destroyed simultaneously?
If they are in the same city, but a couple of kilometres apart, that still wouldn't protect you from a devastating earthquake that can equally hit your primary and secondary location. Assuming that you have stashed your seed in such a way, I am thinking you wouldn't place one backup on another continent. It's probably somewhere close enough for you to reach in a reasonable time frame that doesn't involve 1000s kilometres of travelling to.
