SAFE DEPOSIT BOXES ARE NOT SAFE. THEY OFTEN GET DRILLED. IF YOU MUST USE A SAFE DEPOSIT BOX KEEP A COLDCARD IN THERE RATHER THAN STEEL PLATE SO IT IS PROTECTED BY A PIN AT LEAST. OR USE A PASSPHRASE. OR USE MULTISIG. BUT IN ALL SITUATIONS ASSUME THE SAFE DEPOSIT BOX WILL BE COMPROMISED AND MITIGA...

I would use SEED XOR and keep one copy with a family member or at a second deposit box. Also male sure you put the steel plates in tamper evident bags; otherwise, you won’t know if the seed phrase has been compromised. If you want a KYC free option for multisig, nunchuk has a great product with ...