no one has the best chance of winning between crypto or fiat. however we will only choose to gamble with crypto over fiat currency, whenever there is fiat currency involved, online casinos are required to verify the identity of the player this makes us reluctant to gamble using fiat currency.
Besides that using crypto is more efficient than using fiat in terms of deposits or withdrawals, we don't need to provide a lot of sensitive information and there is no possibility of our personal data being hacked.