Actually, I'm not sure the number of casinos is actually increasing these days - we just hear about new ones, but rarely notice the ones that vanish.
Btw, these days when USA is still in the dark ages when it comes to legislation and EU have more and more taxes - it doesn't seem like an easy money.
This. People speak like you would have just to open a casino and money would automatically come in. But you have also to invest a lot of money and time. Competition is strong, etc.
You can easily play at Bitcoin gambling sites from the USA. In this case Bitcoin gambling is really helpful. Yes, EU have more and more regulation and more and more taxes, but not for Bitcoin gambling sites.
Hence, Bitcoin gambling could really help to increase traffic, but on the other site, a lot of scammers try to abuse this decentralized and anonymous system.