$Chipotle Mexican Grill(CMG)$ investing is the simplest thing ever. Just buy and hold great and profitable companies, and you will make money in the long run. You just need patience. Most people try to trade stocks but lose money, if you buy the best companies out there you don't have to worry. Some try to time the market by selling at the high and expecting to buy back when it goes lower, but in reality it's very difficult to try to time the market as we might not even get the chance to buy back at a lower price.