But again, he is also a very close, personal friend of Warren Buffet hehehe. Maybe Warren's influence caused the change of heart.
No one is capable of influencing someone being worth $90 billion and 1000x smarter than Warren Buffett.
Bill Gates changed the world with Microsoft in his own way, added value to how we use the internet, applications, etc. What did Warren Buffett do? He just entered and left markets on time, which is great for him personally, and Berkshire's shareholders, but hasn't been of any sort of value for the world itself. Buffet knows that his time has come to an end, and that must hurt, especially with how he has been wrong on Bitcoin for many years.
Also, Berkshire Hathaway has quite a large stake in Goldman Sachs, and if they really didn't like Bitcoin, they and their other co-shareholders have enough saying to at least make things more difficult for Goldman Sachs. All these old farts are nothing more than a bunch of hypocrites; they act like they hate Bitcoin, but don't have problems with Goldman Sachs becoming more valuable due to their stakes in the crypto world.
Munger said Bitcoin is rat poison, and he is absolutely right. Bitcoin is the rat poison exterminating rats called banks and governments.