think it depends on their understanding of bitcoin and their perception of bitcoin. They really need it and want it, they will learn it themselves and there are many different ways to get knowledge about bitcoin. For me, I'm still young to tell them about bitcoin they certainly do not believe
We don't need to convince people about bitcoin, honestly, unless they are the one who are going to ask us about it first, then I guess we should tell them about it even a little bit for them to have idea about bitcoin, then the rest is up to them, whether they will do it or not.