You must be solving a tier one issue for people, an issue that is in the top 3 of their lives. Otherwise you run a high risk of failure. The more you can focus on products and services that solve a problem, make life easier, or add kudos in a niche market that has enough people in it, the higher your chances of success.
Skill Transformation: success isn’t about being the best at a particular activity. Value is created when a multitude of modest skills are gathered in one person. If you have a paying job, then you have skills you can put into a passion or hobby.