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

https://telegra.ph/10-Things-Competitors-Inform-You-About-CSGO-Gambling-Crash-09-16

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