Acharya Prashant addresses the fear of social image and the anxiety regarding what others think. He explains that this fear is fundamentally rooted in greed and dependency. When an individual is ready to be 'sold' in the market of social validation, they become obsessed with maintaining a high image to fetch a better price. This concern for one's image is a sign of weakness and a desire to deceive others by presenting a false, attractive version of oneself. The speaker compares this fear to that of a thief who is terrified of being caught while trying to loot others.