It's also theft .. no one device, or place, is good enough.
Discussion
What do you mean by “it’s also theft”?
theft, fire, loss, etc. best to spread out. And also be protected from theft. they can't steal more than 1
I’ve mitigated those risks.
not if I theive a pic of your steel plate seed tho 😎
I saw a metal plate system somewhere that came with two plates, and you need both plates to read the seed. One plate was completely blank, and the other had the grid and little holes for each grid square. The idea was that you'd put the two plates together and punch your seed letters, then seperate the plates and store them in different locations. The blank plate would have all the punch marks but no notation or indication of the letters, and so you'd need the other plate to reveal what the punch marks represented. I was impressed with the ingenuity.
Single-sig with two metal backups is probably sufficient in practical terms. Multi-sig may be technically more secure and safe on paper. I think it really depends on your risk tolerance, and how much complexity you're willing to handle.
It's not too bad. Just open 4 electrum wallets