A writer with no head for business isn’t going to make a living with the words they write, no matter how glorious, how well-crafted, how extraordinary they are, outside an incredible run of good luck.
— Kameron Hurley on Writing as a business
This applies to developers as well. Even if you have no aspirations to start your own business, knowing about options, employee contracts, personal finance, and retirement would do you well.
Eric L. Barnes 