Roubini, the economist that we all love 
Some people might take you seriously on that, so a bit of clarification:
https://www.banking.senate.gov/imo/media/doc/Roubini%20Testimony%2010-11-18.pdf
Quote
Crypto is the Mother of All Scams and (Now Busted) Bubbles While Blockchain Is The Most Over-Hyped Technology Ever, No Better than a Spreadsheet/Database
Nouriel Roubini
Stern School of Business New York University October 2018
Nouriel Roubini
Stern School of Business New York University October 2018
Anyhow, Roubini has been wrong so many times since 2007 that has passed beyond the broken clock scenario unless seconds are ears and we must wait for another 36 millennia to hit a prediction right. Seeing all the doomsday lovers screaming the end of the world is coming makes me more optimistic.