It's obvious why he said that: He owns tons of Fiat money. Bitcoin is NOT fiat money. This is bad for him, thus he tries to spread rumors and fear against Bitcoin and a lot of people fall for it and spread these rumors over and over again. Simple as that ! DO NOT fall for this cheap propaganda/misinformation attempt.
That doesn't make sense if you think about it.
Warren Buffet made enough last year to buy every single Bitcoin that has ever been mined. If he truly thought this what would stop him buying up some Bitcoin?
I think he is being honest with his interpretation. Whether that interpretation is correct is open to debate.