There's no indicated that crypto withdrawals wouldn't need a KYC I think the Terms and Conditions still matters than what you are saying here since that's Official one. I think you should include on your Terms and Condition and make it clear that there will be no KYC in withdrawing cryptocurrencies.
Did you read the terms & conditions? you will find it on our website.
9.5 You must maintain your account and keep your details up-to-date. We reserve the right to make a phone call to the number provided in your user account, which at our own discretion can be a necessary part of the KYC procedure. Until the account is fully verified, no cashouts will be processed. In case the provided phone number is incorrect, missing or false or the player will not answer the phone call, we reserve the right to confiscate your winnings and/or disable your user account. We will make reasonable efforts trying to contact you regarding the withdrawal of the funds, but if we are not able to reach you (by email or phone) in two (2) weeks, the funds will be retained by the Company, since you have failed to pass the KYC procedure.