It's been a volatile few months for bitcoin. In January 2021, it surged past $40,000 a coin but has since fallen sharply from its record high. Skeptics worry bitcoin is in a bubble, but Wall Street giants like Citi and JPMorgan think the cryptocurrency still has a lot of room to run higher. » Subscribe to CNBC: https://cnb.cx/SubscribeCNBC» Subscribe to CNBC TV: https://cnb.cx/SubscribeCNBCtelevision» Subscribe to CNBC Classic: https://cnb.cx/SubscribeCNBCclassicAbout CNBC: From 'Wall Street' to 'Main Street' to award winning original documentaries and Reality TV series, CNBC has you covered. Experience special sneak peeks of your favorite shows, exclusive video and more.Connect with CNBC News OnlineGet the latest news: https://www.cnbc.com/Follow CNBC on LinkedIn: https://cnb.cx/LinkedInCNBCFollow CNBC News on Facebook: https://cnb.cx/LikeCNBCFollow CNBC News on Twitter: https://cnb.cx/FollowCNBCFollow CNBC News on Instagram: https://cnb.cx/InstagramCNBC#CNBCWhat's Happening With Bitcoin?