Jamie Dimon testifies about blockchain, cryptocurrency and consumer security

The CEOs of America’s largest banks testify on Capitol Hill about how the industry has transformed in the 10 years following the financial crisis. » Subscribe to CNBC: About 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 Online Get the latest news: Find CNBC News on Faceb