Well, there nothing wrong showing your friend what you're into, but you know bitcoin investment is highly risky, I have made the same mistake of telling my friend to invest and when he loss his money, it seem to him as if am responsible for his loss or am indirectly aware how his money went to loss. So my kindy advise when telling people about bitcoin tell them to take enough time to learn first, when they learn and be satisfied to invest, at that point you're no longer responsible because the person knows what is fully involved.