Less than what happens to other people’s wealth. That leaves others needing to sell things that the wealthy might want. Look for example at wealth recovery post 2008
Whatever was broken in 2008 (and a lot was broken in 2008) regarding how people win or lose in the markets, it's nothing compared to if the markets are simply no longer actually following accounting rules.
You have to be willing to go deeper to see what can be done.
Say they start fudging numbers at DoL, so only them would know real truth and everyone else is just blundering in the dark.
Combined with ownership of power structures, there is no need for money per se, you can acquire all of the critical infrastructure by applying blunt force. Check your nearest dictatorship for an example, we have plenty to choose from in recent history.