It depends....
If you already have cryptos, bet on cryptos because it will be safer and faster than converting them to Fiat. Likewise, you will also be able to withdraw your crypto earnings anonymously from many sites (which don't require KYC).
But if you choose Fiat, the number of sites you can bet on increases a lot, especially for sports and championships that aren't very popular.
be the best option but if not then fiat casinos will be your choice.This is where people do mainly prefer on basing on their needs and preference.Choices would be on personal preference
and we do have lots of legit and reputable gambling sites in crypto market.You do just need to search up.