I guess I am the happy few among gamblers as I actually have made a nice profit (a couple of BTC) up until now. 
With crypto speculation I did encounter some good wins. But when it comes to gambling i am at loss from the start.
Even won 1 BTC a day but still my overall performance can be called poor.
Today I just only lost 0.24 BTC. And I think it is not much. But gambling gives you only fun and not money. You have to be lucky in gambling.