Are analysts right to be pessimistic about these AI stocks? What's the modern-day equivalent to King Midas turning everything he touched to gold? Artificial intelligence (AI) is a top candidate. Many AI stocks have delivered sizzling gains over the past 18 months. Nvidia (NVDA -0.36%) is the most famous example, with the demand for its AI chips helping push the company's market cap above $3 trillion. But all good things eventually come to an end. Although analysts still think Nvidia has some room to run, th ...