When asked about institutional investors buying bitcoin Roubini, an NYU economics professor, launched into a diatribe about the first cryptocurrency not being an asset but a “speculative bubble”—which he’s said many times— before calling MicroStrategy CEO Michael Saylor a “coke head," accusing Elon Musk of "market manipulation" and saying stablecoin-issuer Tether is a “criminal enterprise.”

CoinDesk editor Lawrence Lewitinn reacts to one of crypto critic Nouriel Roubini's spicier claims (Photo: CoinDesk)