If there’s one thing Ashton Kutcher is good at, it’s investing. Unfortunately for him, that’s simply a hobby of sorts, with his profession being an actor in Hollywood. Should he make the change once his run on Two and a Half Men ends? We say yes. At TechCrunch Disrupt today, Kutcher was more than entertaining. He came across smart and savvy, then brought cheers from the audience when he said he flew on Southwest Airlines from Los Angeles to San Francisco. “I feel bad taking a private plane from there to here,” he said. “It’s not very energy efficient.” While on stage, he revealed that he tried…