Shorting fiat is available to all. That should be considered the baseline position, we should assume everyone with two brain cells do it.
The billionaires had to do something else right. Yes, it's often taxes, essentially re-stealing stolen loot. But unpopular opinion - the money is better off with the billionaires than with the state anyway.
We should also consider the honest billionaires and centimillionaires that are actually the majority. I know a few and very few would even go near state funds.