"Double down" started at the blackjack table—you're doubling your bet with just...

https://www.yankee-bookmarkings.win/double-down-comes-straight-from-blackjack-where-you-double-your-bet-in-a

"Double down" started at the blackjack table—you're doubling your bet with just one more card, hoping for a lucky break. Learners often misuse it to mean "try harder," but it’s really about risking more when you already have skin in the game