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.
You have to tell them at first that invest only the money you can afford to lose, because there are so many fluctuations. Don't just tell them that they can earn a big profit when they invest in bitcoin tell them also the disadvantages of investing in bitcoin.