I also agree that this bone-headed decision could be responsible for bitcoin's decline in the last few days. Makes me wonder how the other corporations that purchased bitcoin feel about this, and perhaps what they might do. Hopefully Tesla doesn't induce companies like MicroStrategy, Square, Marathon Digital, and others to sell. Just imagine if that were to happen. Bitcoin would probably be under $10k in no time.
That would be his strategic plan, if Bitcoin market has not matured enough, and if institutional whales have not yet invested in bitcoin, the whole market (Bitcoin and altcoins) would have crashed, likely less than $10000 bitcoin price will be possible. But, this did not happen, the market has even slightly grown back above $50000.
I do not know the plan of Elon musk exactly, but it is definitely a manipulating plan, I am thinking he is just try to make sure bitcoin market should crash so that he will be able to use the meme thing to increase the market value of Doge, by also making Tesla to be accepting Doge as payment.
I am wondering someone who knows about Bitcoin mining to just have a sharp decision, he is definitely after something.