Elon Musk's ex-girlfriend Grimes told author Walter Isaacson that the billionaire stayed up all night, playing video game 'Elden Ring' after offering to buy Twitter (now called X). "Instead of sleeping, he played until 5:30 [am]," the singer stated. Musk was in "stress mode" during the day, she added. Apparently after finishing the game, Musk tweeted, "I made an offer."