Plenty of nocoiners that I know don't automatically assume that Bitcoin is inherently scammy. I don't talk about it much in real life but I feel comfortable talking about it to people that I know well enough to be receptive when I talk to them about it. Sure they might not instantly jump onboard but they also don't instantly dismiss it. I've got a few friends to start dipping their toes in recently. Just start broaching the subject and go from there. The worst case is they just tell you no then you move on to another subject.