Gold and silver have a long history as a means of maintaining value and increasing value!
Older people can't afford high-risk investments, and gold and silver are low-risk for older people to invest!
The older people they know on there generations is to invest gold and silver that's why until now they continue to invest in gold - silver cause this kind of investment is low risk unlike bitcoin is high risk. The older people can't afford the face the high risk of bitcoin.