Well, I don't think everything will be useless. Think it was John Maynard Keynes who said "The market can stay irrational longer than you can stay solvent." Whi

Well, I don't think everything will be useless. Think it was John Maynard Keynes who said "The market can stay irrational longer than you can stay solvent." While that quote concerned shorting a bubble, I'd say the principle holds for determining when a bull market will turn, as well. While I'm 'beating' the S&P by 10% over my puny 3.2 year life, I gained more value from feeling the urge to trade during downturns, but resisting, seeing bad investments fade away (thanks, SolarCity), and effects of global events, such as Brexit and Trump USA. I would recommend trying stocks to people who can afford to do so as a way to really learn what books mean when they say there is an irrational 'fight or flight' instinct that individual investors have, not to mention the herd mentality of institutional investors. Hope that clarifies things.