The recent emergence of fresh concern over the long-term safety of artificial intelligence may lead to the loss of confidence in the long-term growth of some of the brightest tech stocks in the US.Artificial intelligence stocks have faced a wide range of challenges in recent months, including the emergence of fierce competition from China and capex concerns among hypescalers, but few would’ve banked on a former Anthropic employee warning of a mass extinction event sparking a new wave of uncertainty for Wall Street’s strongest industry over the past four years.In a post on X, Jacob Coxon, a former AI researcher…