The gold like other precious metals are totally physical, not digital like bitcoin etc. or even sone ETFs. Older people people sometimes can't belive how a thing exists while you can't see it and hold in your hand. Anyway they are quite right. The one more reason than gold hasn't drop it's price like from 20k to 6.
After a 2018 drop some people would better belive things like this http://kazspecgeo.com/en/invest/mining-gold.html than that btc will go back to 20k.