NUSA DUA, Indonesia (AP) — It’s not easy being Elon Musk. That was the message the new Twitter owner and billionaire head of Tesla and SpaceX had for younger people who might seek to emulate his entrepreneurial success. “Be careful what you wish for,” Musk told a business forum in Bali on Monday when asked what an up-and-coming “Elon Musk of the East” should focus on.