Yes, 500 dollar bills were in circulation in 1923
Bills with denominations higher than $100 are no longer in circulation. The $500 note had the portrait of William McKinley on the face. The US Federal Reserve began taking high denomination bills out of circulation in 1969 and fewer than 1000 of most denominations are held by only collectors today.
Older dollar bills are indeed still in circulation. US bills aren't removed from circulation until they wear out.
500 dollars. These bills were withdrawn in 69 but still in circulation and still legal tender.
No one keeps exact track of the number of $2 bills in circulation from various counties. In the US the BEP estimates there are over 500 million American $2 bills in circulation but it's not physically possible to know how many have been lost / damaged / hidden...
Essentially none. The last US $500 bills were printed in 1945 (although they carried the date 1934) and since July 1969 banks have not been permitted to distribute bills larger than $100. Any that may have been in circulation at the time have almost certainly been removed either by banks that received them in deposits or by people who saved them as collectors' items.
Yes. The U.S. printed higher denomination bills until the 1940s. They've all long since been removed from circulation and collector value exceeds face value.
Some countries have 500 unit bills, others do not.
Old bills are taken out of circulation by central banks and replaced with new bills. This process is called demonetization. Old bills are typically collected by banks and then destroyed either by shredding or burning to prevent them from re-entering circulation.
The US dollar bill with the highest circulation today is the $100. Other bills with a higher amount are currently not in circulation. These include $500, $1000, $5000, and $10,000. While technically still legal to use, they're worth more to collectors. There were also special $100,000 bills printed for use inside the government but these were never available to the general public.
What became of bills for $500 and up after 1969
10000 / 20 = 500 You'd need 500 $20 bills to make $10,000.