Investing into a casino is not really something people can do without having a thick skin. It is not an easy thing and there are too many emotional people that have breakdowns over the volatility as well. I have seen so many people that basically said that casino is stealing money from the investors by claiming they are actually posing as customer on their own casino and win because they know something and get the investors money.
Yes, investors are sore losers just like gamblers as well some times. Which means if you are patient and you have a thick skin, there could be days someone wins 200+ bitcoins and maybe it will happen few times back to back as well? It is all a possibility since we are all doing something based on luck. All of this is not that easy but if you can wait it is a great thing over long term obviously.
Basically what people are saying about investment is the fact that there is really not much you can do but to wait, if you are in a hurry you should not do it. Plus, there is an extra with the investment as well that many people do not consider. Bitcoin is something that usually gains value, and I mean in long term it really does, rarely it ever has a lower year than previous year (even if previous year has higher highs, it also has lower lows) so that means if you hold buy bitcoin and hold it, you are going to make a profit from it. When you invest here, you are going to make a profit with that too.
So, let's assume you invest 1 bitcoin here today, you spent 9k and bought it, and now you are invested 1 bitcoin, at the end of 2 years you are going to both have 1.2 bitcoin (made up example) but also it will be like 15-16k because bitcoin goes up too.