Smallest largest banknote?

Pretty much:

$100 in April 2023 has the same buying power as…

$55.64 in Jan 2000
$42.00 in Jan 1990
$25.65 in Jan 1980
$12.46 in Jan 1970
$9.66 in Jan 1960
$7.75 in Jan 1950

All that said, some want to eliminate high denomination notes to make life harder for those, “pursuing tax evasion, financial crime, terrorist finance and corruption.” Making it Harder for the Bad Guys: The Case for Eliminating High Denomination Notes | Harvard Kennedy School

2010-2014 discussion: Why are there no bills large than a $100 bill? - #3 by Northern_Piper