Kind of like using SpaceX to fund SolarCity and then using Tesla to bail out SolarCity so that SpaceX bond holdings doesn't go bust?
Right... so SpaceX doesn't go bust. Not "so he can personally enrich himself". Nothing I've seen thus far from Elon indicates to me that his decision making is based entirely on his personal net-worth. In fact most of his moves show the exact OPPOSITE - that he doesn't care at all about his personal wealth and he cares about changing the world/completing his vision.
I have absolutely no issues with him using one company to prop up another because he needs both to reach his end-goal. If he was using one company to bail-out a failed investment so his bank account looks a little better I've got a LOT of problems with it.
And you think the reason Space-x exists is to make Elon richer? Or you think it's because he wants to see humans colonize the universe?
The entirety of Oracle's existence is to make Larry rich.
While I think Elon needs to get off twitter and never post another message there again, I think his reasons for founding Space-X and Tesla go far, far beyond personal wealth. There are a million other investments he could've gone in on to enrich himself without risking everything.
It doesn't matter if SpaceX's stated mission is a vanity Mars project, or something easier, and actually useful, like eradicating malaria, or stopping AGW, or bringing about the Worker's Paradise to Earth. You don't pilfer a publically traded company to fund it.