There have been numerous allegations that Elon Musk sold bitcoin to prove liquidity, and this led to the sale of 10% of Tesla's assets.
But Elon Musk denied the claim, saying that he had not sold any of his bitcoins, and that Tesla had sold some of its bitcoins in the first three months of the year & earning $ 272 million.

The news shows that Elon Musk and Tesla have chosen a large amount of bitcoin as their capital, and by accepting bitcoin for their own transactions, they are launching a bitcoin revolution.
Source:
https://cointelegraph.com/news/i-have-not-sold-any-of-my-bitcoin-elon-muskRumors will always come and go but reality will only reveal either by admission or by acceptance .
Elon is here to Play and Earn so lets expect more of this kind in the future but the best thing is we must not listen to hearsay and believe what is true according to our own research .
Elon musk tweeted his Twitter profile with his own speech, I don't sell my bitcoin which means that elon musk a viral person who already invested bitcoin and dogecoin but he didn't sell his any cryptocurrencies.
Elon wont sell in this price because he knows that there can be a more higher value in the future , He has a funds to support His business so why need to sell out in despair .