Warren Buffett Getty Images / Spencer Platt Warren Buffett has repeatedly criticized Bitcoin and other cryptocurrencies as risky and worthless."I can say almost with certainty that they will come to a bad ending," the billionaire investor and Berkshire Hathaway CEO said.Bitcoin has skyrocketed as much as 350% in the past year to record highs.Here are Buffett's 16 best quotes about crypto.Visit Business Insider's homepage for more stories.Warren Buffett has been a vocal critic of Bitcoin in recent years, repeatedly dismissing the cryptocurrency as worthless and a risky, speculative asset.Crypto fans have brushed off the billionaire investor and Berkshire Hathaway CEO's warnings, driving Bitcoin's price up as much as 350% to record highs over the past year.