Trade your 470s for some ATI equipment if you really want to get in on it. The ship has sailed though, unless you want to invest a lot of money.
Seriously? Except day trading it is a freaking good business. ROI in double digit, quite high at times, lows are what most other businesses accept as "decent".
What world do you live in where capital driven businesses (and trading is nothing more - your work pwoer is irrelevant) reutrn 20%-50% PER MONTH?
Yes, you need some money. Like with opening a shop. Hardly a shop ever returns that much money.