I think that the main problem for average joes is that they don't trust themselves holding anything of significant value at home, doesn't matter what it is, gold, crypto, jewelry, and so forth.
People feel comfortable having a bank do the work for them, where in some cases they are even insured up to a certain amount. I can have a safety deposit box be insured up to 50k, but that requires total openness.
This is where the banks come in handy: they offer protection for your important assets and you pay them in return. Even I get anxieties when something valuable is stored at my house, be it a piece of a paper memorabilia worth thousands of dollars or just an average techy item amounting to some tens of thousands of dollars. Idk about any other people but I get the heebie-jeebies holding a significant sum in my hands. The banks can do it, and if they promise me that it'll be insured and I just have to pay extra, then so be it. At least I still get something when the item goes poof.
If you don't want that your bank knows what you store, you can skip the insurance part, but that comes at a risk--frequently you see criminals accurately dig tunnels to where these units are, and we all know how this ends....
A great thought and I often wonder how criminals know what to hit on a relatively safe environment. I'm not saying that it could be insider information but yeah, *wink wink*.
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Here in the Philippines, there's not much interest and craze going on about gold, though it's still somewhat important to know that gold is extremely valuable and will be picked as a currency at any given day by most people, so if in case the massive devaluation of fiat currencies continue, they still have gold to keep them rich. Only the rich guys will buy gold tbh, but the middle class and the proletariat will never have the chance to touch gold IMO, as these precious metals are usually confined within the reach of the wealthy class and governments.