Bitcoin prices are rising fast, and Fortune's Robert Hackett argues the cryptocurrency is approaching bubble territory. CoinShare's Meltem Demirors says otherwise. But the two agree on one thing: more and more investors are turning to cryptocurrency as a means of diversifying their portfolios.
Also in this episode of Brainstorm, hosts Brian O'Keefe and Michal Lev-Ram ask what happened to blockchain, and wonder if anyone has managed to find a practical way to use cryptocurrency as a payment tool.
Finally, Ripple's Brad Garlinghouse joins the show to discuss how U.S. regulation is hindering his company, and explain why China seems primed to dominate digital currency markets.
If you enjoy Brainstorm, check out the Fortune podcast "Reinvent" about companies fighting to thrive in a world turned upside down. To listen and subscribe, click here from your mobile device.