I work as an existential thing. My work produces meaning in my life. Also, being able to share my work with you is what makes my life worth living:
Never retire. Never think about working until you retire, then doing x, y, z in your life.
Better to think:
What do I want to do RIGHT NOW?
For example, if I gave you a trillion dollars, what would you pursue for the rest of your life? What would you create?
Let this lead you!