Nope, this is no existential question (although...). Everybody's talking about "When will Bitcoin die", but what if you die, and your family don't find your key, or don't understand it, or think it's only a useless sheet of paper with some code on it, or simply throw it away... Does this mean the currency's gone forever?
I find the possibility of this event rather realistic (yup I don't believe in eternal life), so that means that someday there might be 21M BTC but only 18M (and counting down...) is left in the market?
I agreed with you,..That is ver much possible to be happen, So I think it is really good to do and needed that we need to teach someone we can trust about our bitcoin savings at least if there's unexpected happen to me there is person knows my private key and password.
I suggest we could give our important keysa nd information to the most nearest person in our life like our husband and wife or one of your children. We must be prepared for something that we don't have holds like death. Came unexpectedly in ones life.