Bitcoin is a 'dangerous speculative bubble,' Yale expert says

"This is a dangerous speculative bubble by any shadow or stretch of the imagination," he told CNBC's "The Rundown."

"I've never seen a chart of a security where the price really has a vertical pattern to it. And bitcoin is the most vertical of any pattern I've ever seen in my career," he added.

https://www.cnbc.com/2017/12/04/bitcoin-is-a-dangerous-speculative-bubble-yale-expert-says.html