Michael Burry says he's not shorting crypto, but does believe it's in a bubble

Michael Burry attends the New York premiere of "The Big Short" at the Ziegfeld Theater in New York City, Nov. 23, 2015.
Jim Spellman | WireImage | Getty Images

Famed investor Michael Burry told CNBC Friday that he has not been betting against cryptocurrencies, but he believes that they are in a speculative bubble that could burst.