Here’s where some of the world’s financial heavyweights stand on the cryptocurrency:

Ben Bernanke, former chairman, US Federal Reserve: “Bitcoin has serious problems”

Warren Buffett, CEO, Berkshire Hathaway: “Bitcoin is not a currency”

Mark Carney, governor, Bank of England: “Potential to enhance resilience”

Vítor Constâncio, vice president, European Central Bank: “Bitcoin is a sort of tulip”

Ray Dalio, founder, Bridgewater Associates: “Bitcoin is a bubble”

Aswath Damodaran, professor, New York University: “Cryptocurrencies have taken the role of gold”

Jamie Dimon, CEO, JPMorgan: “It’s a fraud”

Mario Draghi, president, European Central bank: “It would actually not be in our powers to prohibit and regulate”

James Gorman, CEO, Morgan Stanley: “More than just a fad”

Abby Johnson, CEO, Fidelity: “I’m a believer”

Neel Kashkari, president, Federal Reserve of Minneapolis: “It’s too early to know where this is going to go”

Paul Krugman, professor, City University of New York: “Bitcoin is evil”

Haruhiko Kuroda, governor, Bank of Japan: “May have the potential of significantly changing the structure of financial services”

Arthur Levitt, former commissioner, SEC: “I don’t know whether it will be bitcoin or ethereum … But it’s here to stay”

Howard Marks, co-chairman, Oaktree: “Nothing but an unfounded fad”

Blythe Masters, CEO, Digital Asset Holdings: “It’s analogous to email for money”

Ravi Menon, managing director, Monetary Authority of Singapore: “Potentially transformative”

Mike Novogratz, former chief investment officer, Fortress: “This is going to be the largest bubble of our lifetimes… Everybody should have some”

Vikram Pandit, former CEO, Citi: “Have the promise to change the world”

Robert Shiller, professor, Yale: “The best example [of a bubble] right now is bitcoin”

Larry Summers, former US Secretary of the Treasury: “A very important kind of idea”

Janet Yellen, chairman, US Federal Reserve: “A very important new technology”

Zhou Xiaochuan, governor, People’s Bank of China: “Digital currency and cash will co-exist for a long time“