Senator Elizabeth Warren (D-Mass.) discusses her concerns about cryptocurrency, after big bank CEOs appeared before Congress this week. It turns out, Sen. Warren and JPMorgan Chase CEO Jamie Dimon agree on the dangers of bitcoin. JetBlue and Spirit await the fate of their proposed merger. Columbia Law School Professor and former advisor in the Biden administration Tim Wu explains his perspective on airline consolidation: it isn’t great for consumers. In an op-ed in The New York Times, Wu concludes that M&A in the airspace often leads to higher prices for the same experience. The fourth Republican Presidential debate took place in Alabama on Wednesday, but only four of the candidates participated. Plus, Time Magazine has named Taylor Swift its Person of the Year. CNBC’s Jon Fortt explains why that decision does and doesn’t make sense.  Sen. Elizabeth Warren - 15:34Tim Wu - 34:42 In this episode:Elizabeth Warren, @SenWarrenJon Fortt, @jonforttAndrew Ross Sorkin, @andrewrsorkinBecky Quick, @BeckyQuickJoe Kernen, @JoeSquawkCameron Costa, @CameronCostaNY