Is the market maybe already saturated?
I guess the market is so big that is why more investors are coming in to build their own gambling sites, it would be easy for them to do it as long as they have a great capital and a good game as well. This business is very promising since bitcoin is still new and the adoption process is progressive.
You can try but it's a hard work at the beginning, so you should know what you are doing so you will not be wasting money.