Robinhood CEO Vlad Tenev on AI agents and trading: "Everyone thinks that this is going to be all great and my agent's going to be trading for me." "What happens with all technology is the early adopters do have an easier time." "You're going to get some early wins, possibly if you're doing some kind of agentic trading, because not a lot of people are doing it." "At some point, if everyone's doing it, it becomes almost like if you're not doing it, you're at a disadvantage." "It's kind of…