Casinos are a facility or a web resource that offers engagement in gambling activities to its customers. Casinos are often established in districts with a high concentration of restaurants, hotels, tourist attractions and other entertaining facilities. Online casino games became quite popular in recent times, gathering the attention of both young and adult gamers and experienced gamblers that used to play in real-life casinos. The outburst of the popularity of cryptocurrency and the opportunity to avoid some restrictions have led to the establishment of Bitcoin casinos. Some casinos sites started to accept various cryptocurrency payments for deposit and today, one can find Ethereum and Litecoin casinos with free access. Casinos can become a reason for the development of a gambling addiction and should be treated with according circumspection.