Not just in trading but entirely, even in country to country conflicts. These deepfakes can really trigger more confusing friendship of neighboring countries. And even in the NBA, I think that I have watched some post-game interview of Tatum and he talks shit about his opponents in the playoffs but that video has a disclaimer that it's all AI and it's not a real thing. But the moves, actions, the way Tatum talks on the video, they all sound real and genuine. I think there's also one experiment with Luka.
Sometime it looks that AI can do more harm than good. In bad hands this powerful tool can make so much damage. Like your mentioned deepfakes, now it's so easy to make quality deep fake. Very simple example, put words asking to invest into some random scam and let's take Musk as example telling such words. Just imagine how much money scammers can get in such way.