People usually want to earn money, so it's a good idea to buy low and sell high. You don't want to buy close to the price you think it will reach. Not only beca

People usually want to earn money, so it's a good idea to buy low and sell high. You don't want to buy close to the price you think it will reach. Not only because of the risk of it being wrong, but also because other options exists that is believed to make more money compared to the risk. It would be stupid to buy a stock even if there was a 100 % guarantee for a stock to increase 2 % in 1 year as there are other basically risk free options available.