It's a common verification process if
1) you are playing with larger quantity of crypto, or
2) Suspected abusing their promotions like a bonus hunter, or
3) Possible exploiting of loopholes in their games with multiple accounts
4) Huge withdrawal immediately after a big win.
When you provide your KYC, make sure you are consistent with the ID you provide. i.e. if you use ID card to do KYC in Binance, don't use a different ID like passport in Stake.com. Proof of funds will most likely include a visible bank statement with your name on your provided ID. It usually works for me.
Do read through their terms and condition if you want to be sure this never happens again.
What are you talking about? Are you justt posting to increase your posts ?
He is not talking about kyc he already passed it. He is talking about proof of funds and he is clearly deposited by Crypto . So he must show a proofofhis Crypto source
What a bank statment will habe to owith that ?