I don't know if there is any information on what percentage of bets are on sports and how many are on casino games
I would like to find out this data, it would be interesting

I have friennds who bet on sports but not in casinos
However, I don't know anyone who only bets in casinos

I bet on both, but I think about 90% are sports bets, I think most people here will also be sports bettors