I think Elon absoultely understand Bitcoin. But he's also building businesses in the fiat world - walking a VERY thin wire.
Elon is not going to buy Bitcoin and build in the Bitcoin eco system - because his dream is colonizing other planets. He does need Bitcoin for this - and he knows it.
He bought Twitter because the fiat world needed an outlet to be de-controlled by Government. There are still constraints. He paid what he needed to get control - it was not a financial investment for him.
Let's see how this unfolds - maybe I'm wrong. I think we see Nostr integration with Twitter in the next few years as Government puts more pressure on Elon.