1. A status symbol
Wearing a ring on the thumb is a status symbol, and powerful people will wear a ring on the thumb to show their social status. People who have been promoted in other classes will also wear a ring on their thumb to indicate their "new" status after changing their homes.
3. Show personality traits
Wearing a ring on the thumb indicates that the wearer has a knowledgeable, confident personality and is willing to help others achieve their aspirations and move towards success. Wearing a ring on the thumb is often used to convey individuality and freedom.