Paul Tudor Jones speaks onstage during the 2024 Robin Hood Benefit at Jacob Javits Center on May 13, 2024 in New York City. Kevin Kane | Getty Images Billionaire hedge fund manager Paul Tudor Jones sent a warning signal on Thursday, arguing the U.S. is late to the game on artificial intelligence regulation. "We need to do it tomorrow," he told CNBC's " Squawk Box " on Thursday. "We're late already. We should have already done it." According to Jones, governments need to watermark AI to distinguish between real content and deepfakes. As he raised these concerns, Jones also told CNBC that he recently bought more AI stocks. Professionals are growing increasingly concerned about the dangers of AI as the technology becomes more sophisticated. At a recent conference with AI experts and model makers, Jones said 80% of participants supported AI regulation, up from around 20% last year. The leader of one of those companies said he was surprised the industry wasn't regulated yet, Jones added.…