I would say betting is growing more because you can find local betting shops literally everywhere, where people can go in and experience the vibe and excitement. There's always a league , such as the Premier League, Champions League, or World Cup, that people are engaged with, cheering for their clubs and countries. So they are  mostly betting on sports games.

On the other hand, casinos are not as available while there are some places with nice casinos to chill in, they're not always readily available. Where I stay now, casinos are not handy; betting shops are more and so people seem more attached to betting than casinos, unless they want to play online. Aside from the youth, elderly people might not have the time or flexibility to play casino games on their phones. Overall, I think betting is growing wider.