“Double down” comes from blackjack, where you double your bet after seeing your...

https://utopian-bunny-9c7.notion.site/Double-down-comes-straight-from-blackjack-you-double-your-bet-when-you-re-3ac32fcbb5b980c99bb6d0c3a6d73011

“Double down” comes from blackjack, where you double your bet after seeing your first two cards, betting bigger on a strong hand. Many learners misuse it to mean ‘try twice’—it’s really about committing more when you’re confident, not repeating an action.