You gain credibility. People come to you. Opportunities come to you. You gain incredible leverage when you are among the only people with that precise expertise. In other words, once you develop a reputation for knowing what no one else knows, opportunities flow to you for years. For example: An entrepreneur with a great reputation will have investor capital flow to them again and again. A speaker with a great reputation will be offered more bookings than they can possibly accept. A teacher with a great reputation will have students lining up to take their class semester after semester.