On your question if coinplay.com will be among the top casinos. Presently, we cannot honestly know the answer because it is new. However, on what you told everyone that their offering is similar to other bookmakers and sportsbooks, I disagree. Coinplay is only one of the very few that has a unique offering for special bets on predicting outcomes on cinema and tv games.
I am presently looking at this bet on the movie Creed 3 hehe. Coinplay is offering a bet if the movie's domestic box office opening weekend in America will be over $28.5 million or under.
https://coinplay.com/line/tv-games/1033765-special-bets-cinema/160268579-creed-iii-opening-weekend-box-officeCreed 1 made $30.1 million in the domestic box office on the opening weekend. Creed 2 made $35.3 million during Thanks giving weekend. Their Rottentomato ratings are very good with 91% fresh pick and 83% fresh pick. However, because of the bad American economy and because Silvester Stallone will not be in the movie, I reckon it might not do similarly well as Creed 1 and 2. It might make under $28.5 million in the box office.
You can bet on anything, not just on sports. The main thing is that there should be a large number of fans in the area where you place bets. Many are interested in movies and the number of their fans only continues to grow. And this means that betting on movies will be very popular. Again, this is a difference from many other casinos.