Warren Buffett? Charlie Munger? Liz Claman? Becky Quick? Mark Cuban? Apocryphal?

Question for Quote Investigator: The value of bitcoin has fluctuated dramatically. Extreme language has been used to either praise or vilify this prominent digital currency. The superinvestors Warren Buffett and Charlie Munger have made harsh pronouncements. Apparently, Munger said bitcoin was rat poison, and Buffett went further and said it was rat poison squared. Would you please help me to find citations?
Reply from Quote Investigator: Berkshire Hathaway Chairman Warren Buffett and Vice Chairman Charlie Munger have employed a sequence of hostile colorful expressions to decry bitcoin. In May 2013 Fox Business journalist Liz Claman conducted a joint interview with Charlie Munger, Warren Buffett, and Bill Gates. During the interview Munger described bitcoin as rat poison. Boldface added to excerpts by QI:1
Liz Claman: I just had to get your thought on Bitcoin, this… this… this digital currency that’s out there that people say, oh it might be the next big thing. What do you think?
Charlie Munger: I think it’s rat poison.
(Laughter)Warren Buffet: Put him down as undecided.
(Laughter)
Below are additional selected citations in chronological order.
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