Mainly vanity. Your score is really not high. It is a luxury, but it is a bit neither fish nor fowl to set up a stall.

Some students had better not wear a ring. Most students know that, so they hardly buy or wear a ring. When they have friends, friends will give them rings, but they are high-end rings. No one will send a friend to the stall, haha.

You haven't analyzed the market carefully, so take a good look. There is still a lot to learn.