I read here that some of the gambling websites usually ask for KYC information before withdrawal can be made.
Withdrawal can be delayed too even without the requiry kyc.
So better check the primedice terms of service before playing the dice game.
Terms and conditions needs to be read if you are willing to take that risk playing such huge amount of money, if you are unsure reading is very essential so before you go inside you are aware with information that you need make sure to understand everything correctly.