You'd need geniune "marginal" income data not wealth to calculate that accurately. Wealth is an illusory "value" it is inflated by asset pices that mean you can only sell it slowly without potentially reducing the price. This is far less true of widely accepted ( 'liquid') assets like cash.

Their marginal value of +/-1 minute worked is probably actually very low, since most their income is "unearned". but ignore that for the sake of stupid calculation. assume they sacrifice an average amount to pick up this cash.

You can start with say roughly +$270bn over 12 years being a bit less than $50k per minute. That +270 can cover inflation adjusting the 2012 start point to crrent prices, it's in the rounding.

But even assuming they converted it all to liquid assets art once , and tank the asset price so that, instead of £50k/min the break-even might be $5k/min. very roughly i'm looking at $100 per second. That's your break even you have to get close to.

After that it's a matter of practicality, face value per bill, ordering/stacking, spread/density, and wind. Assume no tools, vacuums, or scoops, just what can be gathered by one greedy c*nt by hand.

If it's , say, a single $100 bill already at their feet, then it is probably worth it to them (or maybe handful of $100s if you prefer to think wealth = cash).

A few $20s? probably; if they could gather 5x$20s per second and reach the break even rate - seems doable if the density is there. $10s or lower? I doubt it - unless the cash was neatly stacked or bundled.

But, suppose they were put on to an effectively infinite but random mess of $1 bills; I dont think it's worth it to them. I don't think they could physically gather it fast enough. Plus at scale, they'd have overhead costs to store, transport, bundle , count it and then wait in line at the bank and other such indignities.

If it was more like this: https://youtu.be/YEbs0RUyksI?t=363 then no chance.