Thanks for this. It seems making profits from this also depends on the coins one invests in. So, I guess you have to invest in the right cryptocurrency to be profitable.
Well, this thing does not look as easy as it sounds
It also depends on the duration of your investment, other coins receive less profit because they're not used frequently on crypto-games. It's always best to invest on the first or main cryptocurrency of the casino.
Few users are sharing their invesment experience from bitcoin casinos(
example similar to what carlfeb linked) and with that information available it's much easier to know the expected profit they're making.