There's two issues with that theory: (a) Somebody in another thread mentioned that margin for those loans would trigger at around $120, so assuming that's true TSLA has another 50% to lose before it would happen. (b) Even if that was the case and TSLA lost those 50%, that would mean he'd have to cover the loans with cash. He cannot use xAI shares for that because contrary to TSLA it is not a publicly traded company. There is no open market price that lenders could accept. So, he didn't gain anything by moving money around, he'd still need to get the cash from somewhere.
Twitter started with $13 billion in debt and now has $12 billion, so was only able to make $1 billion in profit in about two and a half years. Twitter was making around $500 billion a quarter before the Apple ad targeting changes that Meta was able to recover from back to more than their profitability before the changes, so if Twitter only got back to ~$100 billion a quarter they failed pretty hard in comparison to Meta despite how much more efficient they were supposed to be, but he got political control out of it, and now acquired a ton of political control from poaching Tesla AI employees from himself for a new startup during the biggest AI boom in history with no significant further development of Tesla's AI training hardware and many of Tesla's top researchers moved over.