I never bother until someone who himself gets interested and request me to give some explanation. For them I used to show our forum as well used to give the basic idea of what is cryptocurrency and the consequences faced in these days along with the need for such a evolution. Further is their responsibility to learn, make investment, trades or whatever upon their own risk.
it's much better, many of us waste too much time and energy just telling someone and convincing someone, even though they aren't necessarily interested and even anti to bitcoin, it will be simpler and not bother you if you teach about bitcoin, to people who already really interested to bitcoin.