Its a huge ammount to put at bankrolls from casinos, even knowing they are profitable its a huge risk to make just those investment, with 100k i would make my own casino, soo the risk would be reduced to zero, and who knows maybe build an exchange, since this are the two places where are the most coins being spent.
That's true, if someone really wants to invest his money on internet then why should they invest such a big amount to another website while he can make one or more than one websites himself? Like casinos, or exchanges etc, so better to do that or just to invest the money in a business in real world.