I convince my relatives or my friend to show how it works.And i show to them my earnings proof. And if you convince people you need to teach them all what u know about the bitcoin. Some people just want to get referrals then after that get referrals they are abandoned.
Yes, that could be one of the things that we need to show, we need to show them our payment proofs, in order for us to believe, people didnt believes easily, they need to see what is the output first of others before believing, and if they are interested, it is easy for us to convince our relatives in a short period of time.