But I guess that's when you're starting from zero. I think that investing in stocks or general interest in finance, etc. might count as well.
10,000 hrs, that's just the old number I heard when I started. Fits with the theory from 'Outliers'. I don't know if it's true, but I have a feeling that it is, at least for me. It doesn't mean you can make it earlier, it doesn't mean you cannot trade at all till you reach the magic threshold.
What would you say, how long did it take you to get where you are now?
Fail better.