Bitcoin slides after record highs, so what is in store for the future of the cryptocurrency. Could the Federal Reserve consider creating its own version? Plus, Bitcoin is getting so popular even pop star Katy Perry is asking about it. Her talk with Warren Buffett. The CEO of grocery delivery company Instacart explains how it is expanding its reach with big chains. Mazda and Subaru unveil new vehicles at the Los Angeles Auto Show. While NBC fires longtime popular anchor Matt Lauer over sexual misconduct allegations.