[Fnoord]

Buy 2. Put one in offsite location (e.g. your notary). I don't have a notary; I got one always in my pocket, and the other one at home in a safe (pickable though). YMMV.

[akerl_]

For 99% of humans, an attacker breaking into their home to pick their safe lock is not part of their digital threat model, so that’s pretty sane.

[Fnoord]

Correct, though could be an insider (friend of a child for example). If my house burns down and my trousers with it I'm toast.