A company that's rallied almost 62,000% since its debut makes for a no-brainer buy in August, while another that had gained more than 60,000% on a year-to-basis is a disaster waiting to happen. For more than three decades, investors have consistently had a next-big-thing technology or trend to captivate their attention and wallets. For instance, artificial intelligence (AI) has been a driving force for Wall Street's major stock indexes for almost three years. But more than one market-driving trend can exist ...