https://www.cnbc.com/2017/11/27/citadels-griffin-says-bitcoin-has-elements-of-the-tulip-bulb-mania.html >Citadel's Ken Griffin said bitcoin may be in a bubble on Monday. >"Bitcoin right now has many of the elements of the tulip bulb mania we saw back hundreds of years ago in Holland," said the billionaire hedge fund manager in an exclusive interview with CNBC's Leslie Picker.