Why??? Why would anyone play on these when there are eur and usd casinos and poker rooms?
Because on many crypto casinos they can stay anonymous and they don't have to share their personal details with anyone else. If you know how to play, it helps you increase your stash for the coins you play with.
I try to move money to Coinpoker.com or any crypto poker and the minimum transaction fee for btc is over 20$ When my intended deposit 20$.
After the fees to get money on crypto poker my remaining balance is 0
You should read about this before you deposit money on a site. Check the TOS, talk with the support, and if you aren't happy, don't play there. It's that simple. You have to pay a mining fee every time you move coins from one place to another. That's the case when you deposit to Coinpoker.com or whatever you use as well. Coinpoker doesn't have anything to do with that. When you withdraw, the casino might ask you to pay a withdrawal fee. Part of that goes to them and another part to the miners. Or, all of it goes to the miners. It depends on the platform. Check it beforehand.
While when you do usd or eur there no big or no fees at all and the deposit is instant to while crypto not.
Is someone holding a gun to your head and forcing you to gamble with crypto. Use whatever you like better.
Burn down bitcoin!!!! It's the worst useless, inferior shit you can imagine, how did ever get a market value
Very mature.