$2 notes date back to the earliest years of modern US currency in the 1860s. I've heard the $2 note grew unpopular in more recent times due to its association with gambling. Horse and dog track bets tend to be based on $2 stakes, so a stack of $2s had a noxious connotation, like if someone busts out a huge stack of singles and you crack a joke that they must be a stripper.
Many countries get by fine with currency units worth ~$1 and $5 and nothing in between (i.e. Japan ¥100/500 coins, Korea 1000/5000 won notes)
$2 notes date back to the earliest years of modern US currency in the 1860s. I've heard the $2 note grew unpopular in more recent times due to its association with gambling. Horse and dog track bets tend to be based on $2 stakes, so a stack of $2s had a noxious connotation, like if someone busts out a huge stack of singles and you crack a joke that they must be a stripper.
Many countries get by fine with currency units worth ~$1 and $5 and nothing in between (i.e. Japan ¥100/500 coins, Korea 1000/5000 won notes)