it is funny that you never think about stuff like this until it is too late. although i have been thinking about this topic ever since bitcoin price went up. $1200+ right now.
and when my 2014 $200 investment has gone up 6 times that is when i start thinking about what will happen to all my encrypted keys that nobody else has the encryption key, it is not even written down.
I think its not too late for buying or securing your bitcoin for your family on longer years and i could really consider as a good inheritance when we are gone to this world and the best or wise thing to do is teach them gradually on how you do earn them because if you just give them those amounts will surely deplete if would not be used wisely.