Why would Elon Musk even sell his crypto? I am sure that he has plenty of fiat money and holding or loosing money in crypto will not effect his wealth. The only reason why he would do it, is to troll crypto community. Also I think that he has friends, that hold crypto, but are not as rich as he is. If he triggers crypto price drop, his friends financial stability might get hurt. But in general I think that he is not interested in crypto as much as he used to be.
A man estimated to have a net worth of about $220 billion is certainly not dependent on crypto assets worth perhaps a total of $1 billion. In addition, we have previously concluded that his actions only angered the crypto community, and many lost a lot of money because of him. His statements that he still holds crypto certainly have no impact on the market, but if he had published the opposite I believe some would have panicked quite a bit.
A man who needs to be constantly present in the media obviously has some sort of disorder, and besides if anyone has had a chance to watch any of his interviews, his knowledge of cryptocurrencies is at the level of some slightly more advanced beginner on this forum.
I hate the way hes grouped Doge in with Bitcoin and Ethereum. Perhaps in a devious way hes trying to associate Doge with the big players in the crypto game ? Im sure he knows the difference between Bitcoin and Doge and perhaps hes realised hes got millions of useless and pointless Doge and is working on a way of dumping it

Perhaps some of his actions will be clearer to you if you understand his
connection to both altcoins he always mentions.