Apple CEO Tim Cook spoke on a variety of topics at The New York Times DealBook summit, including the company's role in users' mental health -- and the fact that he personally owns Bitcoin. Credit: The New York Times In the wide-ranging interview with the New York Times' Aaron Ross Sorkin, Cook spoke on a variety of topics related to Apple and the broader technology industry. On the topic of cryptocurrency, Cook revealed that maintains an interest in Bitcoin from a "personal point of view." "I do. I think it's reasonable to own it as part of a diversified portfolio,"...