IMO. They have a good savings culture, they have gold very present in their culture, and finally the West has always treated them as fools, and here they show that they do know that the ancient yellow has and holds value and the papers do not 💵 💶
It is rather a cultural thing, in India it is used a lot in jewelry, it is a way to show social status, the more gold you have, the more relevance you have in those around you.