Blackstone Inc. is planning to invest as much as $500 billion in Europe over the next 10 years, Chief Executive Officer Steve Schwarzman said in an interview to mark the 25th anniversary of the money manager’s operations in London. “We see it as a major opportunity for us,” Schwarzman said in an interview with Bloomberg’s Francine Lacqua on Tuesday. “They are starting to change their approach here, which we think will result in higher growth rates. So this has worked out amazingly well for us.”