Yes, you can, I also had good wins a couple of times, but I don't play too often. People need to gamble for fun and to realize that gambling is not for making quick bucks 
The chance of winning is less than 49,5% so you will experience more losses rather than winning.
People can also earn quick buck if they have enough guts to combine big capital and luck just like Dan Bilzerian on his poker player.
So in crypto case, just make sure that you've observe your site before gambling there !