the reason given by Tesla/Elon on why they will discontinue accepting crypto is very strange, they said it's for environmental issues and energy losses due to mining, which is kind of direct attack on the fundamental of Bitcoin itself. Technically, I think OP is right, Elon was probably manipulating all till now and have no vision on it for future, which is just my opinion though seeing their statements and analysing them.
What is more interesting is that Elon 100% knew how bitcoin and its mining works but he intentionally made the announcement that time just to gain attraction, maybe to sell his bitcoins at the best prices and now maybe he just wants to buy his coins and made that announcement and as expected the market dropped.
What happens to Bitcoin we purely relies on Elon? Elon Musk is influencer and his tweets impact on market heavily, that's pretty clear. I guess as long people keep on posting ELon shits there will be no changes. Those people might have ended their concern over Elon tweet now, and focus on investing. There no need to panic and care much about Elon. If you really know Bitcoin you don't give importance on Elon or what he tweets.
It's very sad to see a market made for everyone is now being controlled by a single entity and he is playing with everyone. Although we as traders are solely responsible for this because we are following him blindly and not using our own sense. People going mad about doge coins will soon fall hard and maybe then we start praising Musk for whatever he does.