If you’re worrying about wealth when someone’s trying to kill you, I’m going to suggest re-prioritizing.
He said for SHTF. If SHTF and you're leaving your home, which is hopefully a well-defended position, then I'm assuming it's because things have gone very, very wrong and the fact that you're leaving means you very well might not be coming back. If a good portion of your wealth is in gold then you can just toss it into your pocket, which takes almost no time at all, and be on your way.