For me, I have always seen gold as a long term investment that is sure to be a hedge against inflation. It is so much more valuable than any currency and even Bitcoin could only be as close after the halving event.
Many countries have their own gold reserve because of how valuable it is for both covert and open trading and for payments upon completion of transactions, mostly during times where Fiat isn't sufficiently available due to stringent reasons or otherwise.

I would love to invest in gold anytime and then BTC next because with these in my portfolio, I believe no economic depression or hyperinflation would render me penniless or broke.