I don't think games are a good tool for educating adults about new concepts, they are time-consuming and distracting. You could use them to teach kids, but why would you want to teach kids about Bitcoin in the first place, it's not like they will be using it till they grow up.
Adults play games to relax and have fun, and educational games generally have poor gameplay, so I can't imagine such game being popular.
Such games are probably for adults who stee haven't grown up.
I agree that games are not the best education method for adults because majority of them ( who are not gamers) would not take them seriously or would not be interested for them at all so they will not have desired effect.
Educational games are not bad idea but for children and young people not adults.