He has been an anti-Bitcoin ever since.
I still remember back in 2017 when I was starting to learn about Bitcoin. I remember him calling Bitcoin a "fraud". Well, nobody cares at that moment because at that year as well, Bitcoin's price went up to as high as ~$20,000 before it went down pretty hard the next year of course.
He can just talk about Bitcoin anytime he wants and nobody will be listening to him. He probably is saying that because he knew that there's nothing that he can do to stop Bitcoin at all. He's been negative towards Bitcoin ever since, and still today, and nobody cares about his sentiment. Whatever he says, investors will just invest their money into Bitcoin because they believe that they can get profit on it.
Him, and many more anti-Bitcoin can say anything about Bitcoin. They can criticize Bitcoin, and say negative things towards it. They can try to manipulate investors by saying negative things towards Bitcoin. Nobody cares about their opinion.