I hope this self-moderated thread will be helpful to collect the precious information by avoiding the unnecessary discussions. The withdrawal processing time may not be same for all the cryptos at a casino. I mostly play with USDT nowadays. And here is my experience with withdrawal processing time in different casinos.
BC.Game
Fast withdrawal
No issues
BetFury.io
Fast withdrawal
No issues
DuckDice.io
Fast withdrawal
No issues (First withdrawal takes long time as it goes through some manual checks)
Duel.com
Fast withdrawal
No issues
Duelbits.com
Fast withdrawal
No issues
EarnBet.io
Fast withdrawal (most of the time)
Occasionally, the withdrawal gets delayed for unknown reasons.
Jackpotter.com
Normal withdrawal
Personally, I had faced issues with my first two withdrawals. Both of them had taken a few hours to be processed.
Rainbet.com
Fast withdrawal
No issues
Rollbit.com
Fast withdrawal
No issues
Roobet.com
Fast withdrawal
No issues
Sportsbet.io
Fast withdrawal
No issues
Stake.com
Fast withdrawal
No issues
Shuffle.com
Fast withdrawal
No issues
Thrill.com
Fast withdrawal
No issues
Yeet.com
Fast withdrawal
No issues
I have skipped those casinos where I made deposit and withdrawal one time only. I have also skipped those casinos where I haven't played since the last few months. I will edit and update this post by including my experience of withdrawal processing time of those casinos which I have skipped for the above reasons.