I'm off to try to understand why people buy gold as a means of future proofing personal finances. I've had gold hoarders try to explain it to me but I'm not convinced.
Buying gold as an 'investment' is no better that buying any other shares - risky and not a good idea if you can't afford to lose the money.
People who buy gold are likely trying to take care of their old age when pension funds may fail - it is a response to fear of an uncertain future. In my opinion the best response is building relationships with friends and family who will look out for you just as you look out for them. Community will be the only safety net.
Gold has no practical use outside of a few specialist scientific/ manufacturing functions. It is only worth whatever someone will pay for it. In a declining society where resources are short, are you really going to find a buyer for your stashed gold so that you can meet your electricity bill or buy a month's food?
It has the advantage of being portable if you don't trust the banks for your savings, but it makes you a target for looters and robbers if anyone suspects you have it. All over Britain and Europe there have been found hoards of gold buried by some wealthy Roman, who no doubt intended to return and dig it up when "things have settled down".
Instead of gold, invest any spare money you have in paying off debt and mortgage, then buying practical things that will be directly useful: supplies of long-life food (eat what you store and store what you eat - i.e. rotate your stocks); garden and household tools, know-how books, clothes and shoes, etc. Also invest in learning useful things, e.g. a sewing course or an evening class in one of the household trades such as plumbing or mechanics. Then you can work for cash or barter for friends and family - a useful person is always popular in hard times.
e.g. I heard that the cotton harvests in Egypt and India have failed, so cotton will shoot up in price soon. I have in my drawers and cupboards about decade's supply of cotton underwear and t-shirts, as they will only go up in price. (Although I could always switch to bamboo).
Caveat - I realise many people have no spare cash and no storage for much in the way of supplies. This response is about an alternative to buying gold.