There are many gambling sites that you can see in this forum, some of the members here have given reviews about these gambling sites. Maybe you see gambling is very profitable, but you don't see on the other hand that gambling can make you lose money in an instant.
There is no gambling that has no risk, if you want high profits then you must also accept high risk. And remember gambling is a very risky game.
You must read and understand the question first before replied his question. He never asks which is best gambling site to gamble his money, he asks about which best gambling site to invest his money on there.