Gambling should be for entertainment and fun! If you desire to used as an investment platform then you should be ready to face the risk in it because the probability of losing all your investments will hold.
I really don't know why the hell people are always saying investments in gambling even if they're not in partnership with the house. Pretty seems like they don't know the difference at all, and much more is that they've been expecting something in return with some assurance.
Many do not understand the difference and it is a shame, this is why many treat their investments as if they are just gambling and when you ask them about basic knowledge they need to be profitable in their trades they do not know what you are talking about, however that is a belief that I only found in the people that regularly gamble, when I gambled at physical casinos I used to chat with people about this and those that were there for the first time were there only to have fun, but those that were there constantly had the idea that they could make money in gambling even if they were long term losers.