I personally stay away from "Advising" family members to buy into investments. You don't wanna get into that territory if things don't turn out well. Instead i provide them with "consultation" and leave them to decide on their own.
The only people i advise for investments are those who pay me for it.
Yeah, when it comes to money, you have to be careful. Nothing would be worse then to advise your family to save a lot of money in BTC and then have it completely fail and you be the cause of their financial loss.