Gambling with Bitcoin is not a good idea even if the fees aren't as high as they are right now, at least I don't like it.
It's just an option or an option that you can skip if you don't like it.
And there are many other coin options if the casino platform supports more coins.
Some people who gamble use bitcoin not only to make a profit from the value of bitcoin,
but also to accumulate Bitcoin holdings in order to get more if they get winnings.
It's better if you gamble using stable coins because it makes it easier for you to keep a count if you are using a stable coin such as USDT, you will know how much you are using as the bet, how much you had, how much you have lost or won, etc., but if you are gambling with Bitcoin, it wouldn't be that easy and you will need to see the conversion of Bitcoin to USDT first to find out what you are trying to see.
USDT or any other altcoins that have a cheap transfer. Doge, LTC and even TRON are the other choices of most of the gamblers for altcoins gambling. USDT is fine because you get the actual value of it, but you should also choose the network where you'll send it because ERC20 is not cheap anymore.
More casinos use the Tron Network because it is cheaper and faster, Stablecoins on the Tron Network are also an option.
And some other networks are usually also available, but for ERC20 it still seems quite expensive.
Like the
airbet.io Online Casino that I use,
there are around 17 Crypto Currencies including BTC, ETH, LTC, DOGE, TRX, stablecoin USDT, USDC which uses the TRX and BSC Network with cheaper fees.
https://airbet.io/