I've been playing around with some "crypto casinos" and I found Apollo to be a very straightforward way to play Roulette with Bitcoins. It's very intuitive and easy to play.
I found out Studypool while looking ways to earn money online and I'm glad I tried Studypool. I've been earning really easy money there on my free time since I'm really good with math and I now have a strong network on students. Things get a bit slow during the summer break but it makes sense as it is the time of the year the school season ends.