I would like to play a monopoly with Bitcoin too. Unfortunately, there is no site offering such service.
Board games are not that popular so developing a working version of known board games and implement Bitcoin + provably fair mechanics will be a risky move.
No wonder that there are not many casino owners who want to venture on that unknown ground.
I've never heard of any board bitcoin games. May be because users around are loving the fast games like dice and plinkos.
And when you involve money /coins/, the bot problem is popping up for the fairness part.
For fiat, I'm playing from time to time on
https://king.com/