Imagine you have a very bad time at work and you are so fed up with your co-workers for months. How would it feel like, if you would be in a position to just tell them:
Go and fuck yourself!
You need to earn it.
I do speak from experience that it feels awesome. However, to get in such a luxurious position you need to work hard, so that one day you posses two things: Fuck You Skills and Fuck You Money.
Fuck You Skills means that you are so skilled in your area of expertise, that it would be very easy for you to find a new job. What kind of skills you require are very specific for each indivdual. Whether you become a great salesperson, the super effective manager or a very specialized expert depends on your traits and interests.
Fuck You Money means that you have so much money, that it does not even matter, whether you work at all. I am so happy that I have both.