Sorry, but ask the Jews in 30s-40s Germany how all that “hiding the jewels” went. If they want your gold, they’ll pull out your teeth and comb through the wreckage of your burnt body to find it.
The only metal worth having if the SHTF is lead, and the means to propel it down range.
Sorry to be Debbie Downer here, but absent the rule of law, the only law is Colt or Smith & Wessen...
It’s a no win situation. If heaven forbid in the extremely unlikely scenario where all civil order broke down and it became every man for themselves, every military and law enforcement armory in the country would be emptied out in hours or days.
There would be individuals and groups of trained armed ex-soldiers or police living off the land for their survival and lots of them. Some of them would be good, some of them would be bad. Does anybody in their right mind think that they could survive a contest armed with civilian weaponry against guys who likely will be armed to the teeth with stuff that makes Colt or Smith & Wesson look like kids toys ? Guys who are trained in how to use those arms and small unit combat tactics.
I am not even talking about organized crime gangs who we already know have stockpiles of military grade weaponry squirreled away for future use. They are dangerous enough but not nearly so much as a highly trained soldier.
You might get lucky and waste one or two of them who are coming to get your “stuff” but I hate to say it, if it is a group of them working in concert with each other, they are going to snuff almost any civilian’s a** and hardly break a sweat doing it.
All that having been said. I wouldn’t worry about it since for various reasons a Mad Max scenario here in the US is about as likely as me winning the Powerball jackpot.