Do you have any friends you want to invite here, but unfortunately they have negative impression about cryptocurrencies? Let me give you some pieces of advice what you should do.
1. Explain the nature of Bitcoin in a precise and comprehensible manner. Cite how it is used and that it's not totally illegal and that it's just a substitute form of currency that doesn't include a middle men or banks to any of its transaction. It's also good to mention that some countries and state banned online currencies because they are afraid that it'll be used for crime purposes like terrorist financing and money laundering.
2. If you have fully explained what bitcoin is, now describe what Cryptotalk is and what kind of work we're doing here. How much we're earning and the fact that it can help you financially. Most importantly, discuss its rules & regulations and relevance to bitcoins.
I hope this helps! Also, if you want to add some further explanation, information you'd love to share, or some corrections with what I have stated, feel free to say so. <33