Penny stocks are among the most popular assets among day traders because of their substantially lower prices compared to big companies like Berkshire Hathaway and Amazon. They are also high-risk investments, as evidenced by the performance of Fisker and Bit Brother. So, here are some penny stocks to buy for short-term gains.Are you looking for signals & alerts from pro-traders? Sign-up to Invezz Signals™ for FREE. Takes 2 mins.GoProCopy link to sectionGoPro (NASDAQ: GPRO) has become one of the biggest falle ...