Many people have profited from investing in the stock market. Many also had reported losses when they invested in the stock market. That's just how stock market investing is, you either gain or you lose your investment.
Every stock market investor knows that picking the right stocks to invest in can help bring your portfolio in the black. There is, of course, no definite guarantee that a stock will always yield gains instead of losses. By choosing the right stocks to buy you lessen the risk of losing your investment.