You are right, I don't think either that any investor will be happy, allowing his funds to just go like that after his death without pass it on to his next of kin . As at this stage of your life, you are suppose to have gotten someone which you can really trust to pass your inheritance and if you don't,it means you don't trust yourself either or you are not telling yourself the truth,no matter how distance or close you can be to your family members, there most be someone which you will trust and desire to be your next of kin, if you have not gotten your own family, which I believe that even among your husband/wife and children,you still have pick someone, for me I think, it is best you chose from your family, introduce and teach the person about Bitcoin,and assist him or her to also be investing in Bitcoin, so that he will be happy and do as you wish when you need his or her help in future(mainly health related issues) or after death, there will be no problems so that your instructions on your Bitcoin investment will be carried out properly.
Although the advice you said seems quite wise for everyone, you also have to understand that not everyone can like and be comfortable with such advice because everyone also has their own thoughts and tastes in giving certain things to others including those closest to them. Actually I also like the idea you said, but I don't completely burden my closest people to invest in something they don't like, so I prefer to give some choices and comparisons when they want to invest in something so they can judge for themselves that Bitcoin is indeed much better than anything else in this world.
So never force anyone to invest in Bitcoin, you do not know whether Bitcoin will actually pump in the future, that is why when you force someone to invest in Bitcoin, and Bitcoin does not give you the return you expected after a certain period of time, then the entire blame will fall on you. You will only be limited to giving advice, never force. Let them make their own decisions by analyzing their own judgment, if they can really understand the possibilities of Bitcoin, then they will want to invest in Bitcoin on their own, otherwise you do not need to force them.
One obvious fact about this life is that it is full of uncertainty, nothing is promised, even tomorrow and our lives is not quaranteed, and on the case of Bitcoin, it is full of potential no doubt, because if you pay close attention to it's magnificent growth over the years, it shows that among all asset around the world today, Bitcoin is the best among them all right now to invest in, and it
hasn't gotten to it peak price like the other, that's why we believe that it still has the capacity of going up to a million dollar or more in the future due to how it has performed in a very short while of it existence and how limited it totally supply is.
It is left for us to decide whether to enter into the moving train now that it is not too late, than to regret later in the future when it has gotten to it peak.