Not true! You are way off base. Anyone can make money in the market. You just have to acknowledge the risk reward ratio and know your style of tradings.
A conservative investor can make 10% a year by the old fashion way: diversify. Holding high paying dividend stocks like utilities, and some grow stocks combinations.
No, this will not make you rich overnight, but you won't lose your shirt either. My style is I don't buy junk, penny, and high flying stocks. Everyone is different, you must know yourselves.
Pay attention to the news, not hyped. Do the homework on the stocks you own. I read about AAPL rate of grow slowing down, and the warnings weeks ago, and I wasn't even looking for it. Someone told me long ago, that if I lose sleep at night worrying about my stocks, it's time to sell down to the level I can be comfortable with. I'm sure AAPL will make a come back, but how long will it be? and at what price?