Billionaire Elon Musk said on Tuesday he will step down as chief executive of Twitter Inc once he finds a replacement, but will still run some key divisions of the social media platform. “I will resign as CEO as soon as I find someone foolish enough to take the job! After that, I will just run the software & servers teams,” Musk wrote on Twitter. Musk’s $44 billion takeover of Twitter in October has been marked by chaos and controversy, with some investors questioning if he is too distracted to also properly run his electric vehicle automaker Tesla Inc, in which he is personally involved in production and engineering.