First, I don't expect SpaceX to have sold its Bitcoin holdings, or perhaps they did, but earlier, because it doesn't make sense to sell at a loss.
Secondly, I do not rule out the theory that governments, especially the United States government, are behind everything that happened. Governments have a long history of manipulation in secret, out of sight and without leaving behind any clear evidence.
Governments have manipulation but they do not have results, in the sense that they plan something and get something different, for example every time they manipulate the market to break Bitcoin, but Bitcoin comes out stronger every time and investor confidence increases, you can look at what is happening now as everyone considers this decline a new opportunity to buy.
Space X has been proactive in selling their BTC before the Media, the last one they did, they sold before making the announcement in their first quarter of 2023 and the announcement did a lot of damage, so people don't want to sit and let that happen again, everything surrounding them is now more of speculation, nobody knows and Elon has not made any positive words or green light if they still hold or not just like the way they did back then before acquiring Twitter(X) for liquidity.
In the current state of the bitcoin market, we have more market makers and traders than holders which is why, anytime there is FUD, the price use to falls because they will certainly reduce their long position to mitigate an uncertain loss especially when they are not sure about what is causing the FUD. The government can manipulate bitcoin price though, where there is power, expect the worst from such because they can do and undo. Who knows if they decide to pressure institutional institutions to sell their bitcoin.