en.wikipedia.org/wiki/Large_denominations_of_United_States_currency

Large denominations of United States currency greater than $100 were circulated by the United States Treasury until 1969. Since then, U.S. dollar banknotes ...

www.treasury.gov/resource-center/faqs/Currency/Pages/denominations.aspx

Jul 8, 2014 ... The purpose of the United States currency system is to serve the needs ... With the arrival of more secure transfer technologies, however, they ...

www.uscurrency.gov/sites/default/files/downloadable-materials/files/CEP_Dollars_In_Detail_Brochure_0.pdf

Color-shifting ink. Tilt the note to see the ink in the numbers on the lower right corner change color from copper to green on denominations of $10 and higher.

www.investopedia.com/ask/answers/070516/why-british-pound-stronger-us-dollar.asp

Oct 16, 2018 ... For all of recent history, one U.S. dollar has been worth less than one ... It's also worth considering that many more dollars are in circulation than ...

www.marketplace.org/2015/12/23/economy/thousand-dollar-bills

Dec 23, 2015 ... “It might only have been worth $20 in 'real' hard money at the time.” ... The U.S. stopped printing the $1,000 bill and larger denominations by ...