I am 30 years old and doing a degree in pure maths wishing to work towards a Phd in pure maths. Think I will be late 30's when finished with this Phd. Unfortunately, I am not a maths genius and they say a job in pure maths is extremely difficult. Being close to 40 doesn't help either. If after a year, I am unable to find a job in pure math then my plan is to do a Master degree in theoretical physics (I have already completed a bachelor degree in physics but prefer pure maths more at least for now) with hope of gaining a Phd in theoretical physics afterwards. If successful I will be late 40s when finished with this Phd. I will then try to get a job in theoretical physics research. What are the odds of me being successful at getting a job in my late 40s in physics? Note: I am able to live alone, partner-less and childless. I will be tutoring all those years to earn a living. Hopefully will get some scholarship on the side as well. I guess even if I don't get a physics job at 50 years old, I will at least have 2 Phds and be a sought after math and physics tutor? If able, will also do some of my own research on the side. What do you people think? Am I crazy? I would be the perfect example of doing what you love. But I will be alone my whole life! What I was thinking was that because of my extensive maths background, may be able to tackle some sexy areas in theoretical physics like TOE and what not. They say the person who figures that out is likely to be a loner of some sort like Einstein was. But a 50+ year old loner? Suggestions would be grateful.