Ours are locked in a fire resistant safe which is bolted with concrete anchors to the foundation of our home, right next to our passports and certified copies of family bith certificates.
It’s under key AND combination lock. Anyone trying to steal that will either have to torch it open they destroying the contents or literally pulling our house apart.
Not that I’m paranoid or anything....
Is your house earth-bermed? If not why not? (just kidding)
Good job ......