Maybe "stupid" is not the proper word, "foolish" would be a better fit.

People are motivated by greed, many believe there's an easy way to make money, everybody thinks trading is easy,
they hear the name Warren Buffet and they're ready to bow down a say their prayers to him

Read some of the question here on YA, by those seeking the holy grail, is very sad, they spend more time looking for the short cuts than studying the right way.

Nothing in life is easy, but it takes financial losses for many to realize it, as the great P.T Barnum would say, "There's one born every minute"