Why do rural people like to wear gold necklaces, and there are few urban people?

This is a good question, this is a psychological problem. In short, everyone knows that rich people have money. Do you know whether to wear gold or silver? Most rural people have no money, and they can't hold their heads in front of others. Therefore, if you have money, you must wear gold and silver, and you don't want people to know that you have no money. That's it.