Robinhood CEO Vlad Tenev: Bitcoin's gone from largely being ridiculed to being taken very seriously

Robinhood co-founder and CEO Vlad Tenev joins 'Squawk Box' to discuss bitcoin's latest rally, Fed Chair Powell's comments on the cryptocurrency, impact of President-elect Trump's pick to lead the SEC, Robinhood's first-ever investor day, possible venture into sports betting, and more.