Investing in bitcoin is better than investing in stocks because if you hold bitcoin in long term you will earn astronomical profits in shortest time since bitcoin gained 800 percent since january 2017 so if you invested this year then you are lucky. But still bitcoin is still good for short term since bitcoin price is always fluctuating but if you are a risk taker then use it in long term. As for stocks investing with it is sometimes risky since the price depends on the company's performance so if you invested on poir performing company then you wasting your money