At a young age you think that you need to reach a goal in you life, ex become a doctor. But with time you realize that you maybe don't like that job anymore. In this case it's very important to find a job that you are good at. This leads to an easier job that you can handle, and by that even have fun.
If you don't work with something that you like, the time will gi slow and it will be boring. This leads to an lower salary.
The point is that if you go in your own hand and pick a job that you can do, you will have a giod salary, thereby a good life with house, cars and more.
Succes!