Crypto casinos let players use digital currencies, so you control your wallet...

https://reliabless.com/why-do-exchanges-ask-for-id-before-i-can-buy-crypto-for-gambling/

Crypto casinos let players use digital currencies, so you control your wallet and private keys, meaning you’re responsible for your funds. Traditional online casinos use regular money, where your deposited £20 stays as £20 without conversion