There have been several articles saying Elon Musk is going to lose money and be broke soon. This is hogwash. Yes, he lost 200 billion dollars. However he is still the richest man (publicly) in the world.
Space X is doing amazingly well. They launched 61 rockets to space this year. NASA and other space organizations are considering sending SpaceX to save some people. This is in contrast to several companies trying to invest in tech for the military.
The big competition for richest man in the world (publicly) doesn't seem to be working out for others. Warren Buffett is about to become the second richest man again. Amazon and Microsoft have declared themselves for SJW stuff, and are in decline with the rest of Seattle. Buffet has kept his investments smart and regained his spot.
So Elon is doing fine. The competition is defeating itself, while his companies are still rising.
Then why are they worried about his tax returns?
For the headline.
They do everything just for the headline to keep the last few bit of sheep that they have under their control still there to give them some hope that they will get the orangeman.
Projecting. They think Trump's either as corrupt as they are, or as incompetent at hiding it as they are.