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

https://papa-wiki.win/index.php/Why_Do_Fiat_Casinos_Feel_Easier_to_Budget_For%3F

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