Crash gambling works like a countdown race: the multiplier increases continuously up until it drops to absolutely no

https://blogfreely.net/celenaygjp/lets-get-it-out-of-the-way-15-things-about-crash-gambling-were-overheard

Crash gambling works like a countdown race: the multiplier increases constantly till it drops to zero. Players need to choose when to lock revenue, balancing greed against survival.