Warren Buffett is still a Bitcoin sadist till today and he doesn't believe that Bitcoin have any monetary value at all but that one is left to him. There are many people that had been asking for the regulation of Bitcoin by the government because of so many big scams that had happened before now. If Bitcoin ever get regulated, it are not going to be the same again like we used to enjoy it.
I'm not a big fan of Warren Buffett, but I like his thoughts and sometimes agree with them. Warren Buffett said one brilliant phrase that "Bitcoin will someday cost $0". This should not be taken literally. He understands that the price of Bitcoin will be manipulated and says that the price of Bitcoin will first reach certain heights, and then will remain at the bottom for a very long time, because manipulators will no longer be interested in this asset. But he doesn't tell us when this will happen.