In my opinion, telling people to buy bitcoin is a terrible idea, as any other investment advice.
If they lose money, they will blame you. And they probably will. Anyone who seeks for investment advice is going to lose money, because nobody that know what they are doing would ask for an investment advice.
What I do is to tell about BTC, and say that I invest in it. I tell about it, but most of the people have the completely wrong idea about it. I try to give them a more precise idea about what Bitcoin is, why it is important and why so many people buy it ( and no, it is not to make quick money).
I try to tell about decentralization," digital gold", buy anything with pseudo anonymously, freedom, etc.
It is not at all a bad idea for as long as you educate them properly. Bitcoin is not as simple as what other people may think so as bitcoin enthusiast it is your task to properly educate possible investors what is bitcoin, it's benefits, it's advantages and disadvantages and how it really works. I think if you have presented all these things to them then they will not blame since you have provided them valuable information of what bitcoin really is. For me, it is how you educate your family and friends about bitcoin because if you provided them all the information for them to think about if they will invest or not then no problem but if you are the person who will just inform possible investors that you can get big money in bitcoin right away then that's were the problem begins. Sure it is true we can get big profits but not all the time because the price is very unpredictable it's not always green.
On the other hand, I don't share it to my family members but some of my friends know it but they are not that interested in bitcoin as a whole because they see it as a scam. Thus, I don't really bother educating them.