CoinDesk's president of indices and data has a message for investors: Don't count out bitcoin. "When I got my first smartphone, which is a great example of a disruptive technology that has been incorporated into my life, I didn't get the smartphone and say, 'This thing is garbage because I can't get a taxi in front of my home whenever I want it.' I was very excited that I didn't have to carry an MP3 player and my cellphone at the same time," David LaValle told CNBC's "ETF Edge" on Monday. LaValle's call comes during a rough time for bitcoin. The cryptocurrency is off almost 2% over the shortened holiday week. Plus, ... (full story)