To be successful or happy in any job, you need passion for it. The moment you have lost that passion, every job is a drag. So ask yourself would you still be passionate about being a doctor after working in it for 30 years and facing lots of hardships along the way. Or you prefer a more relaxed, less stressful job environment, one where you are not held responsible for another person’s life or wellbeing. A doctor is definitely a noble profession but not everyone can be one, be they rich or smart.