Artificial intelligence (AI) stocks have been all the rage this year, climbing the charts in hockey-stick-like fashion and reaching meteoric valuations. Some expect the rally to continue as interest rates decline and the Federal Reserve engineers a soft landing for the U.S. economy, in which inflation falls and a major recession is avoided.Others, however, are concerned that scenario won't happen and that the AI market has gotten too frothy. One of these investors appears to be the billionaire hedge fund ma ...