That's exactly what I've been racking my own brain for lately: How do we make their money worthless but continue to survive ourselves?
That was the big problem with crypto. It might've even started as a cool idea that would "democratize currency". . . except the dickheads with all the fiat money could just buy and hoard it all like everything else, because they had all the money. So it just became another high stakes gambling operation for them to extract MORE wealth from us.
If their loads of money didn't buy them everything anymore, they'd be left bare as the useless human beings they truly are, and would stop causing harm.
But obviously, our entire society runs on the same money they've stolen so... it's so frustrating...