We can share through facebook massage, twitter post and in circles of friends bonding. Even facebook banned cryptocurrency advertisement we can make it an massage to post in public. Then after that if you I have friend who are interested  about bitcoin then I will help her to share my knowledge about crypto. Even though seems I'm not worthy I will try still to introduce bitcoin to her because by sharing my knowledge can make her more knowledgeable than I. Or can I make it in private massage to say everything to her.