https://www.uscurrency.gov
/life-cycle/data/circulation
About 50% to 70% of USD currency (cash) in circulation is outside of the USA.
https://fred.stlouisfed.org/series/MBCURRCIR
That leaves about $1.2 Trillion washing around in the USA. That is about the same amount as 245 million adult citizens over 18 will get @ $5000 each.
That is so very interesting.