You should invest in the stock market because it is a great way to help fuel you to get out of debt fast and reach your saving and investment goals faster than saving money alone. The stock market also allows you to diversify your investments, which would mean investing in more than one company. If you only invested in one company, then if that company fails or does not do well financially, your entire saving and investment plan could fail with it. Investing also comes with tax benefits, which means that part of the money earned from investing goes back into your pocket as income at the end of each year. You will still need to pay taxes on those earnings, but this might be better for some people who are saving so they can afford expenses and have extra cash at the end of each month.