Grayscale CEO on Elon Musk's tweet rattling crypto markets

Bitcoin sank as low as $42,000 Monday morning before making a slight rebound. A weekend tweet from Tesla CEO Elon Musk may have been behind the drop. The tweet led some to believe Tesla had sold its bitcoin holdings, but early Monday morning, Musk tweeted, “To clarify speculation, Tesla has not sold any Bitcoin." Grayscale CEO Michael Sonnenshein joined "Squawk Box" on Monday to discuss.