There’s a second act ahead for many serial entrepreneurs of the last decade, including Travis Kalanick and Mike Cagney, CNBC’s Deirdre Bosa reports. Finland’s Prime Minister is hoping to shorten the workweek for her citizens, and Facebook is making some changes regarding deepfakes. Tesla has hit a market cap milestone, Elon Musk is dancing, but Wall Street analysts Gene Munster and Craig Irwin are split on its stock. Plus Blackstone’s Byron Wien and Joe Zidle release their surprise market predictions for 2020, from the S&P to the Senate.