Statistically speaking, you'll probably have a better chance getting rich by begging in your free time, and using that money to buy lottery tickets, than by starting out in indie development.
My suggestion would be to focus on your career, and if you feel the job's easy, apply to a higher paying/harder position.
My aim is to make enough bucks to make a living out of it and not getting rich, but I believe that in both cases story is the same; the chanches are small to make it, regardless the extend.
I remember when I talked with my current boss about gamedev - he said that they tried this as company's side bussiness, but it turned out it's just a big fuc* up and simply not worth of investing. They quickly abandoned the program and went after some stupid shit like 3D printing technology. They started to make molds of some misc stuff, maybe even dildos, totally stupid, but it made an income. There were even cases of game developers, who developed games since they were almost in dipers and I see them now being depended from kickstarter or donations, after investing up to 5% of their lifetime into a single game tittle.