Tim Cook has invested in cryptocurrency personally, but Apple has no plans to do so.

While Apple might not offer users a way to pay with cryptocurrency anytime soon, its leader has invested in it personally.

Tim Cook, Apple’s chief executive, said at the DealBook Online Summit on Tuesday that he has bought cryptocurrencies. “I think it’s reasonable to own it as part of a diversified portfolio,” Mr. Cook told DealBook’s Andrew Ross Sorkin, quickly adding that he wasn’t giving investment advice.

It was a rare insight into how Mr. Cook manages a portion of his billion-dollar fortune. He said he has done some research on crypto and has been interested in it for “a while.” The typically volatile Bitcoin price hit a record at above $68,000 earlier on Tuesday.

The revelation came as Mr. Cook said that Apple itself did not intend to join a growing number of big businesses incorporating crypto in their operations. Tesla, for instance, began accepting Bitcoin as payment for its electric vehicles this year and bought $1.5 billion worth to hold in its corporate treasury.

Mr. Cook said, however, that Apple didn’t plan to buy any Bitcoin with its roughly $200 billion in cash — “I don’t think people buy Apple stock to get exposure to crypto,” he said — and added that it had no plans to make crypto an accepted method of payment anytime soon. “It’s not something we have immediate plans to do,” he said.

But never say never: Mr. Cook added, cryptically, “There are other things that we are definitely looking at.”