What makes you think that they are similar? If you can elaborate your reasoning's here why you are thinking like that the we can give you an appropriate answer to your questions.

Casinos are very different if you are going to compare it to exchanges but if you can elaborate some similarities to the two then we will be happy to give our own opinions and ideas to satisfy your doubts as exchanges are platforms where you can exchange crypto currencies to fiat and vice versa while casinos are focusing on games different games where the player can double their money or lost it.