It doesn't really matters if he is holding his coins or selling them because the market will saturate.
He has manipulated the crypto market many times and it shows why we should not trust him or fall for his tweets related to cryptocurrencies.
He will be a good example in the history of bitcoin of why people should avoid crypto influencers.
The man very much seeks to manipulate the crypto market and he's been doing it for a while. He has reasons for it - recently Tesla filed its annual report with SEC, and it turned out they have invested some 2 billion dollars in Bitcoin. According to the same report, however, there were no investments in Dogecoin.