You hear many different opinions about wealth creation. Some say you should do what you are passionate about; some say you should not “ruin” your passion by turning it into “work,” while others still say do what it takes regardless of your passion.
A book analyzing this famous question. Researching studies, experts, stories, science, psychology, etc., and painting the whole picture with logical and factually sound conclusions.
Just like luxury cars and other items, far more people are interested in them than are actually buying. Why not one for private jets?
Publication (online/print) dedicated to the private jet and the world of owning one.
So you can find one or more solution to any financial calculation need you might have.
An online resource where you can search in plain language for a financial formula that can help you. You will get one or more results, and each will be explained: what is it for, how is it different than alternative formulas, how to use it, common online tools that you can use, etc.
See what your favorite leaders in different fields do as a hobby.
Publish a series of articles, each about one important figure (current or from the past) showing and telling their story about their hobbies.
Find everything there is to know about a particular produce. Science, history, recipes, etc.
A series of websites, each dedicated to only one produce, and giving all the information available on it: recipes, seasons, types, science, history, etc.