At least Musk is generating publicity for BTC and brought it somewhat mainstream with retail investors, which will only be for bitcoin's benefit in the very long run.
However, in the short run, I don't think there is any point in following what he says anymore. He's gone a bit rogue much like Trump's tweeting.
It's not a great look for him, or for TSLA and its shareholders, that he's constantly singing a different tune on various speculative investments. How he can go from investing $1.5b in BTC one day to rejecting it as an environmental antagonist is beyond me. The only explanation is market manipulation.
I am in two minds about this. First of all, Bitcoin has moved past that stage, where any sort of publicity was good. Now cryptocurrency sector is worth $2 trillion plus and we can afford to be more selective. That said, it will be good to end this manipulation by Elon once and for all. This time he has managed to crash Bitcoin prices by 25%-30%. But the dip is a temporary phenomenon and I hope we will be back to $50K very soon. The next time Elon's tweets won't have much impact on the market, because we all know about his intention.