No job is the best job.
While a very few employees (well under 1%) will advance to millionaire status, the odds are against it unless you become a partner in a major law firm, financial outfit like J.P.Morgan or similar.
Being the boss in your own business is the best “career choice” for becoming rich. I don’t know if there are statistics on it, but my guess is the odds are 10 times better that you will become financially independent (i.e. a millionaire or better) if you own a business producing goods or services.
Investing in other people’s businesses where you are not in control is worse than being an employee. Why? Because the odds are you will lose whatever capital you have.