Apple CEO Cook: Cryptocurrency is a reasonable part of an investment portfolio Apple CEO Tim Cook admitted in an interview that he personally holds cryptocurrency. He stated that crypto assets, including Bitcoin and Ethereum, can be part of a diversified investment portfolio, calling it a reasonable allocation strategy. When asked when he first became interested in cryptocurrency, Cook responded that he has been following the space for a long time and has spent time researching it. He candidly said, 'I think it’s very interesting.'