A cryptocurrencies panel at the Milken Institute Global Conference was more like a cryptobrawl — no punches but a barrage of barbed comments.

“All this talk of decentralization is just bullsh*t,” said Nouriel Roubini, an economist known as Dr. Doom for predicting the chaos of the 2008 financial crisis.

 “Everything you just said is irrelevant,” shot back Alex Mashinsky, a blockchain entrepreneur who was an early developer of the Voice over Internet Protocol standard.
“I don’t even know where to begin,” Bill Barhydt, who worked on cryptography for the CIA, responded to Roubini.