My theory is that he wanted to threaten to buy Twitter (or actually buy it) to create political pressure on the Biden administration to stop stonewalling the Starship FAA license. There’s murmurings that the FAA is stonewalling Starship due to political reasons. The “threat” of allowing Trump back on Twitter could create leverage to force the FAA political impasse to be dealt with.

I heard this idea from a colleague in the space industry. Going to Mars is one of Musks main goals, and as crazy as it sounds I could see him doing all this Twitter craziness just to move that ball forward.