How a Saloon's Blue Poker Chips Became a Metaphor for High-Quality Companies

https://idiominsider.com/from-knucklebones-to-algorithms-the-evolution-of-risk-language/

When a Saloon Hand Put All His Savings on a Blue Chip: Elias's Night It was a cold spring evening in 1887, and the saloon on the corner of Main and Third was the kind of place where the wood smelled of smoke and old whiskey