Tesla is a big company that has an analyst team, especially risk management, I'm sure as long as the prospect of cryptocurrencies is still good then they will enter Crypto, even though they can have a big impact but I'm sure if they sell all the bitcoin they save, they will not make great turmoil in Market, because without them Crypto is strong.
Tesla does not have a great impact on bitcoin price than what Elon Musk did by taking to Twitter that Tesla no longer accept bitcoin for payment which crahsed crypto market to an extent including bitcoin which it his focus, but in a way to support doge. So, if the impact was once positive, it later become negative.
If musk decides to sell of all his Bitcoin what will simple happen is FUD will stare so many to sell and we will expect further drop in price. What will happen doesn't really depend on musk selling his coins but how the other investors react to his decision. Musk is more like a crypto influencer and so many depend on him for investment advice
But it would be surprising if the impact won't have such negative effect unlike what happened in the past like I just comment above. What I am thinking of is that the impact won't be significant.
Tesla is a newcomer to Crypto, they officially announce investment at Crypto for about a year, if they sell all Bitcoin, of course this is not a problem, maybe in the short term it will make a market correction but in the long run will return to normal because the Bitcoin community is very strong.
Definitely, Tesla is just a company out of many companies that have gotten into buying and holding bitcoin, but which no longer support bitcoin but only doge, definitely no effect in long term because bitcoin can absolutely survive without Tesla and Elon Musk.