These fast-growing businesses are headed in exactly the right direction. The new bull market has given many people a renewed interest in investing. While fast-rising share prices may have you nervous about buying in at the wrong time, you can find great businesses in any market environment, especially if you invest with a long-term mindset. If you're on the hunt for compelling businesses that look like attractive investments right now, here are two top stocks to consider for your portfolio. 1. Duolingo Duol ...