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.