Nah. Seize his assets, but make him stay here. Make that Nazi bastard experience life the American Way™ - living paycheck to paycheck at a minimum wage job (cause the moment his net worth guess to zero, his political influence does as well - another trademarked advantage of American living).
I really don't think it'll work. Americans absolutely love their celebrities. Elon musk will never be poor, people will just give him money for existing.