What seems to be popular right now?
Writing a book on what helped you find success in life. Since I am not quite sure yet what I want to accomplish with my site, this seems like a good addition to my portfolio. Both is my writing quality and for future employers to see the leadership; values they will inherit with me on their team.
There is also the cynical benefit that writers seem to have good passive income. Maybe one day I can turn this into an actual book. 😃