I won't advertise Bitcoin to just get more people invested on it. But I'd talk to people who are interested about it and I will answer questions that they'll ask to me if they're truly interested. I get the idea, we should really think of the gains that we'll have for it, kind of dismayed for OPs end that it's a whole different world now compared to how he's introduced to it
If the questions come from the end of the person in front on you they are interested in the subject. The idea of preaching bitcoin seems more like some cultish stuff to me, which I frankly never support. We should spread the word but keep it limited so as to not obtain a red flag status among common people around you.
Eventually those who are interested will come and seek you. Most of them might just be get-rich-quick people who will need to be reminded about the reality.
If people use bitcoin they will also get interested on their own without any preaching.