there was a lesson I lean from here. when you are preaching to someone about Bitcoin, you shouldn't talk too much, and you shouldn't stay long and you should also allow them make some research and ask questions about what we are preaching to them, to avoid loss at the end.
In the first place, why preach to someone about Bitcoin?
It's always my habit to just feed them a good response as much as I can once they ask me a question directly about Bitcoin in general. There's no really need to introduce Bitcoin to anyone just allow the adoption to take place normally and look, what a good progress now in terms of adoption since then.
Adding to that, I'm not responding a direct answer to some people before that asked me directly related to Bitcoin when it comes to
"how to earn in Bitcoin". That question is where the point is they should do a bit of research. Later on, they can ask me about what they found out through their research, and on my part, I will give them the best possible response as much as I can.