If your goal is to be rich / powerful then here's a ranking of career types.
- working with your body (clerk, construction, farming)
- supervising people who work with their body
- working with your brain (engineer, marketing) (college degree)
- managing people who work with their brain
- investing your own money (real estate, stocks)
- investing the money of others
Calling this a ranking is overly simplistic. It would be more like a ranking of probabilities. For example, pro athlete makes money with their body but the probability of becoming rich is low.
A simple bullet list doesn't show the ease of movement between careers. It is common to move one step and become a supervisor or manager. However, becoming a manager or supervisor in a particular field is generally a dead end.
Investing doesn't necessarily have prerequisites of education or experience. However, intelligence is necessary and can be gained by education or experience.
One significant benefit of investing your own money is that you can be your own boss and not report to anyone. Consciously or not, I think that's why we're here investing in real estate.
This probably isn't original but I can't think of where I saw it.