Uncle Warren is not warming up to bitcoin.

Mr. Buffett, who earlier this month said he wouldn’t own bitcoin because he doesn’t consider it a store of value or reliable means of exchange, again dismissed bitcoin. During a CNBC interview promoting a contest related to the NCAA basketball tournament, he opined on a range of topics, one of them being bitcoin.

“Stay away from it,” he said, according to a transcript. “It’s a mirage basically.”