There is no proof that Elon Musk has sold his Bitcoin, so he is in the same sinking boat with us.
Why would he make such a statement that would result in a dump of bitcoin... For a rich person like him, he can always sell and buy when the price is very low. By trading alone using his influence to manipulate, he can make millions of dollars in a single day, so it's easy for him.
But then it's just our speculation though, but it's obvious that the reason is Elon Musk's announcement about Tesla suspended in accepting bitcoin.
I dont believe that Tesla suspended accepting Bitcoin due to mining influence on the climate. Perhaps that excuse was only for the public, and real problem are legal issues. His decision made Bitcoin lose 10% of its price; same amount it gamed after Bitcoin as a payment announcement. But he did not say anything yesterday, and we see a -$5k drop. Who is responsible for that?
We don't know the real reason but the damage has been done, and his reputation in crypto now is not anymore good.
He will now be tagged as anti bitcoin.