Was planing to invest on a gambling site since they said its a gauranteed profit since the house can't lose but I'm still skeptical about it, i don't have much BTC so I have to make sure whether its going to be profitable for me. What possibilities could happen to the gambling site i wanted to invest into and how am i going to lose my investment in such a manner?
There is guarantees to have profit on long term when investing, because the casino always make profit on long term, if they wouldn't, the casino would crash and nobody would like to be a casino owner/operator. Invest in gambling sites is different from gambling in gambling sites.
The risk is still there, so investing in a gambling site might not profitable at all. Perhaps your goal should be long term so see if you have really profited but if you don't have much BTC and you are not for the long run then investing it in will not be a good idea for you. Maybe you can go for trading and not investing.
For investing one can start with small amount and slowly they can increase their investment. But start should there and for starting no need to wait for huge money. Yes, all these are a risky investment and if you invest small amount your profit also small. But remember your risk also less with small investments. To reduce your losses, you can diversify your funds into few good casinos then in the longer run you will surely make profit.