Bitcoin is a wonderful wealth inheritance. i guess you should inform and educate your family members how to use it. Educate them how to encash it. If you do not educate them, your bitcoins might be invested to scams like Bitconnect. Or they might seek advice to wrong people when you die. Must teach them properly.
Maybe not all of the family but he can tell his trusted family members and teach him/her about how to use bitcoin so he/she won't have a problem in the future. We can tell the family members, but we cannot force them to learn bitcoin or use bitcoin because that will be their decision to use bitcoin or not. But if one of our family members have a curious about bitcoin, that will be the right time to tell and explain everything that we know to them.
That is i believe is right because we knew Money and we also knew what will happen if this become greedy used?
the value of bitcoin is really going up and we can't deny
the fact that if Bitcoin comes to million value for sure family members will be into the crypto asset we can inherit
them and in the end will even come to fighting,arguing
and the sad part is killing just to win the inheritance.so better educate the most trusted one but never let Him/Her
know your private keys,just let the key hiding until the
final day comes that they need to take their share,by your attorney or even place the keys in your most precious
thing that they can find when your are already gone.