A multiplier climbs from 1x and stops at a number nobody knows in advance. Cash out before it stops and you keep your bet times whatever it read when you pressed. Leave it too long and you get nothing.
Everyone in the round is watching the same curve, so you can see who is still in and who has taken the money. That is the whole game: the bet is easy, the timing is not.
Set an auto cashout if you would rather not fight your own reflexes. It fires at the exact multiplier you name, which also removes the lag between deciding and clicking.
The crash point is drawn once, when the round is created, from the round's server seed and its client seed. It cannot move while the curve is running, whatever the round looks like. The seed comes from a chain committed in advance, so every reveal hashes back to the terminal hash published before the chain opened, and the client seed is randomness from the public drand beacon drawn after that commit. The seed hash is published up front and any past round can be recomputed in the verifier.
What happens in Crash if I disconnect?
Auto cashout runs on our side, so it still fires at your number if your tab freezes or your connection drops. Without an auto cashout a bet rides to the bust, so set one before playing on a shaky connection.
Can I bet while a Crash round is running?
Yes. A bet placed mid-round is queued for the next round and the button says so; you can cancel it any time before that round starts. Auto bet places the same stake again at the start of every round for you.
Is the Crash point decided before the round starts?
Yes. It is drawn when the round is created from the server seed and the client seed, the seed hash is published before betting opens, and nothing that happens during the round can move it. The seed itself comes from a chain whose terminal hash was published before the chain opened, so the house cannot regenerate it either. Any past round can be recomputed in the verifier.