Dude, 99% of the online crypto casinos operating here offer various bonuses that you can take advantage of, of course you have to go through the conditions set by them.
The point is: maybe we here don't want to be blamed for recommending a casino for you, for the reason that for us a bonus is good, not necessarily for you and vice versa.

My recommendation is that if you want a casino that offers high bonuses, all the casinos available are good, the point is, don't forget to check the two links below.

1. https://bitcointalk.org/index.php?topic=5333602.msg56883071#msg56883071

2. Topic: 🔻 n1 List of Casinos to Avoid

The two links above will show you options, which ones you should avoid and which casinos you should use, I think these two links are fair enough for you.