We can say that there are a lot of reasons why older people preferred to invest in gold or silver but in my own opinion I guess that most common reason why they invest there is because they have a luck of knowledge about the internet and in crypt currencies. We all know that the technology that are beeing used in crypt are so modern which those old people don't know. But I guess if this modern technology had come out earlier together with gold and silver investment the older people will go with crypt currencies rather than gold or silver.