Extraordinary success comes from either being the best at one specific thing, or very good (top 25%) at two or more things. [1]
There’s something very special when your two or more things are enough to build something people want and get it into their hands without having to ask for help or permission.
Learn how to design. How to code. How to market. How to sell. How to read financial statements. How to hire. How to read contracts.
You don’t have to be the best at any of it. But boy does it pay off to be good at all of it.
[1]: https://dilbertblog.typepad.com/the_dilbert_blog/2007/07/career-advice.html