Why gold? Other than some use in electronics or for jewelry, what use is it?
What good is paper money? It has went to zero every time they tried it. Correct?
Why? Because gold is honest. It doesn't need a bail out, or intervention to prop it up. It doesn't rust away and can be quietly handed to your descendants without the d@mn government presuming your inheritance can be stolen via taxation.
It is a time-honored store of value that humans turn to when fiat currencies like ours inevitably fail. (EVERY fiat currency fails at some point.)
When paper 'money' loses the confidence of the people using it, something has to take its place until the patsies start accepting promisary notes again, backed by the full faith and credit of lying politicians.
Jewelry has fascinated humans since the dawn of time and the fascination is not likely to subside any time soon. That means that gold and jewelry will always be useful as a portable investment.
The root word of jewelry is Jew. And Jews have a habit of keeping a fraction of their wealth invested in jewelry because it can be essential in saving their lives when fleeing from antisemitic mobs and tyrants.
Much of what people own has little practical value. From the Mona Lisa to your DVD collection we own things that have value only because they can be looked at. But the aesthetic value of gold is unlikely to become obsolete.