Hahaha user's problem, they got panic if they saw that bitcoin price is going down. But we all know that bitcoin price is temporary and its stability change anytime. Just have a long patience when the price of bitcoin goes up again.
And what do you think about bitcoin price that have reached $1,000 but went down and never go up to that price again? There were people who lost much because of that, and blamed their friends who recommended bitcoin for them as an investment. We need aware to little change in bitcoin price, dont need to panic, just aware it.
We all know that everything has a risk, so if you used something you must know the responsibilities. Yes you are correct they should aware about that, but why you used bitcoin or try it if you don't even know what it can do with your money? I think your friend should told you about that.