I love the idea of Career Capital. Cal Newport shares, “If your goal is to love what you do, you must first build up “career capital” by mastering rare and valuable skills, and then cash in this capital for the traits that define great work.” 
Passions cannot scale like rare and valuable skills. The truth is as we work on these rare and valuable skills we organically develop a passion for acquiring and practicing those skills. The market observes this and can reward us. It is mutually beneficial because we are now getting rewarded for work that is pleasing for us to carry out.