We don’t have very much to be honest as I’m not a jewellery person and neither is DH. We hide our passports and birth certificates well amongst the Christmas tree decorations which are in a box under a pile of other stuff under the stairs.
The only reason we do this is a couple of years ago friends were broken into while she did the school run. They were in and out in 15 minutes (ie were watching her movements ) and the only things they took after ransacking the whole downstairs were the passports from a kitchen drawer (8, as the whole family are dual citizens) and the iPad that had been left on the dining table. They smashed through the back door to get in.
It was very upsetting for them but also an unbelievable hassle to get the passports canceled and reissued and then be on the lookout for identity theft. Police advised they hit four houses within the suburb on the same day with the same MO.