Taylor Swift has joined Elon Musk as ranking among the world’s wealthiest people, according to a new rich list. The American pop star entered the Forbes World’s Billionaires List for the first time with $1.1bn (£877m), along with Sam Altman, creator of the AI chatbot ChatGPT on $1bn (£800m). LVMH French luxury goods titan Bernard Arnault and his family topped the chart …