Casinos are primarily about entertainment and having a good time. Often people's lives are too boring and monotonous, there is nothing new, every day is the same and so on day after day. And then the casino comes to the rescue. People are looking for new and unusual casino experiences and are spending more and more time on these experiences. 
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Casinos give the idea to people to get a lot of money without doing anything, but just playing games. Everyone wants to try their luck. No one wants to work, but everyone wants to have a lot of easy money. That is why casinos are so popular and in demand.