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

https://oliviasgreatop-eds.fotosdefrases.com/idioms-that-sound-negative-but-are-actually-neutral

"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