If you tell your friends and family about Bitcoin without giving them any sort of in-depth financial advice and they go ahead and invest, how do you deal with it when the market dips very low and they silently blame you for losing them money.
If you want to tell your family or friend to invest in bitcoin be sure tell them about the risks that it has, if you are talking about investment there are always risks but it also will make you earn depending on the price of bitcoin but for me I won't force anyone who is not interested and are willing to take the risks with bitcoin. I believe that bitcoin will revolutionize our currency and if they don't think like that then just don't waste your time.