ok, I see your points but simply want somewhere secure to place important docs other than a drawer/box or whatever at home.
If a burglar really wants to I am sure they would either get into it by any means possible or have it away completely, though doubt they would be that prepared or go to that much trouble where we live.
If a fire happens the last thing I will be bothered about is anything placed in the safe or in the house for that matter other than the safety of my partner and children.
I appreciate your thoughts and certainly worthwhile considerations if our usage should change.