In this case it would be on their home soil and the other tycoons will be looking at this situation as well, along with republicans whom are mostly businessmen as well.
This might surprise you, but members of the American billionaire class tend to support Democrats over Republicans.
When Elon Musk first emerged as a supporter of Trump, he was very much shunned by Silicon Valley for it. Mark Zuckerberg didn't "kiss the ring" until after Trump was re-elected in November 2024. Jeff Bezos owns the Washington Post, which of all the major American newspapers, has been Trump's toughest critic since his first term.
If the Trump administration was to seize control of SpaceX, Musk might get wiped out, but that doesn't mean any other shareholder, big or small, will necessarily get burned.
In fact, from the perspective of a shareholder, especially an institutional investor, it's normal, if not good business to remove CEOs who upset regulators and customers simultaneously, and Trump represents both categories.