Vanguard CEO Tim Buckley: Investors Should Be Very Conservative Around Return Assumptions | CNBC

At the Inside ETFs Conference, Vanguard CEO Tim Buckley speaks to CNBC’s Bob Pisani about the state of ETF investing, the environment for active versus passive investing as well as what he thinks about bitcoin. » Subscribe to CNBC: http://cnb.cx/SubscribeCNBC 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: http://www.cnbc.com/ Find CNBC News on Facebook: http://cnb.cx/LikeCNBC Follow…