OP, I feel you made your friends think of Bitcoin as a get-rich-quick scheme, which it is not; maybe you would have given them a better explanation had the Bitcoin price not increased. Did you think telling them about the risk would make them decide not to invest? Promoting Bitcoin means telling people the full details about it, because when you tell them the only thing they want to hear is, "Invest now and when the price goes up, you will make profit." That's a bad promotion habit and could also cause your friends to blame you and give you bad energy about Bitcoin.