The only way a billionaire will ever be hurt by a bubble popping is if they piss off another billionaire. Otherwise they just fail upwards.

Billionaires will buy the dip. They already sold many of their stocks.

They have enough aside to make sure they can purchase as much as they can at bargain price, they won't be the losers of that burst

Sure, but the government shutdown won't end until it impacts the market. In fact, that will be the signal they use