Yup, indeed gambling is not the place to invest. because in the gambling could not be determined whether we profit or win (not sure), but for sure in the 99% of people are gambling gambling will surely experience a defeat, because they were too greedy. gambling is extremely dangerous and it is very risky. So be careful if you want to do gambling.
if you try and read the first post of OP or at least read some of the other comments you realize that he is not talking about investing in "gambling" but instead investing in "gambling sites" or "casinos" which is a good way of investing because of what you said here, when gamblers lose the house is winning which means you share it too.
yeah, most certainly if that online casino is legit then it is a good thing to invest in there.
As we all know that there are only a few person who actually win in gambling especially online and playing pure luck based game in gambling sites like dice will give a lot of profit to the online casinos as most commonly in that kind of game almost everyone lose.
So check the site you want to invest with, if it is legit go, then after a couple of weeks, wait for the profit.
Are you reading the op question? seriously?
He asked if he should invest in bitcoin casinos, it means that he is planning to invest and finance a bitcoin casino which is about to start and ope its bussiness.
There is no such thing as investing in gambling as gambling is not considered to be investing.
and yes there is a way where people will continue to win, and that will only happen if you played a gambling games which is mostly based on skills and strategy rather than luck, games like poker.
Poker commonly used strategies of the player and also his skills in handling cards and knowing when to put down his card (fold) or to increase the amount of the pot. and one more thing you have a better chance of winning if you also know a little of social enginnering in playing those kind of games personally to a physical casinos.