the first thing must be their interest we should develop their interest in bitcoin by introducing them in this forum, staying in this forum they will gradually learn about bitcoin and i am sure that they will want to invest in bitcoin after knowing everything about it.
Just because they get involved in this very forum and read thru topics will mean that they will learn everything there is to know. IMO, the basic information they provide in this forum wouldn't be enough. Users must experience it first hand and should not just be satisfied by hearsays, sure you'll be aware of what might happen, but being confident in what you're doing would be the best case. I will not deny that reading gives you probably all the information you need to know, but it should not stop there.