And the funny thing is the link is to a site promoting trading.
Edit: As for me it doesn't matter if I have traded for over 10 years or never traded. All that is anecdotal. And people will believe what they want. There are losers on this site who portray themselves as fantastic traders and some very good traders who are very modest and don't make much noise. We But i think the facts in the above linked article pretty much speak for themselves. Apart from the money there is also a massive time investment on trading.