With crash gambling, you bank on a multiplier target, such as 1.5 x or 2x

https://telegra.ph/CS2-Crash-Site-Explained-In-Fewer-Than-140-Characters-10-06

With crash gambling, you bet on a multiplier target, such as 1.5 x or 2x. If the multiplier never reaches your chosen point, your bet is lost; if it does, you can take profit.