David Kotok, chairman and CEO of Cumberland Advisors, talks about bitcoin risks and how many fixed income players may not be seasoned enough to withstand a downturn. Mark Dunkerly, departing Hawaiian Airlines president and CEO, tells Pimm Fox and Lisa Abramowicz about retiring from the company and what lies next. Dakin Campbell, a financial reporter at Bloomberg, talks about how Goldman Sachs is facing doubts about loss rates at its new online lender platform. Finally, Shira Ovide, a Bloomberg Gadfly columnist covering technology, discusses why Travis Kalanick needs to explain his role in Uber's breach. 

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