Harvard economist Kenneth Rogoff admitted that he was wrong with his prediction. But it did take him 7 years to admit he's wrong. And probably took his time though and come to his senses that Bitcoin will go and compete with any other assets that is known to man.
On the other hand, Harvard just invested on Bitcoin,
He at least admitted his mistake and shape his regret into a very useful post by advertising his own book too, he got the attention of bitcoin enthusiasts that he regret it and how he calculated it all wrong what was right and the things had happened in the crypto space in the last 8 years were not expected by any person so I don't blame him.
As I said at least he admitted his mistake and bro that a big thing because many don't make such posts openly but it also shows the wisdom the dude have, he must be investing in bitcoin personally and the news is very good that Harvard has invested in IBIT but instead of buying through ETF if they have bought directly that would be much better.