I graduated from grad school at the age of 29. Finally, instead of paying lots of money for the privilege of working very hard, I now was going to work and actually get paid money. As a mathematician, I have this drive to find a problem to solve. During my first day on the job, I decided that work was overrated, and the problem I would solve was: "How can I retire as quickly as possible?" Seven years later, at the age of 36, I retired.
Now for a disclaimer: I don't have any formal training in finance, investing, or statistics, nor am I certified as a personal financial advisor or anything else. All views on this site are my own personal opinions and should not be taken as anything more than that. You should consult a professional financial advisor if you want financial advice.