i heard that investing in gambling sites bank roll is more stable profit than investing in other thing. im planning also to invest bitcoin on a gamblings sites that offer bank roll hoping that i can gain enough and more stable profit from it than wasting my bitcoin in gambling that im not even sure if i can get my capital from it. thanks for this thread looking forward on your investment goodluck 
The profit is not stable at all. There are huge ups and downs. So unless you plan to invest for long, you may not be able to see the profits. It is better to invest in real world stocks and bonds that constantly pays you dividends.