The OP and several users brought up the idea of splitting your private key into parts and giving them to different members of your family (or people you trust). On their own, no one can retrieve your funds. Interesting concept! That said, whatever you choose to do, it's great to start thinking about it now.
cheers
If a person really trust his family and loved ones no need to undergo that hassle method of inheriting process. Well at least for me as we have different status.
Just give it on a one whole shot to the chosen one/s then that's it. As if the one who will came up a plan like that really have lots of bitcoins on his stash. Trust me, it's still way better to just teach our love ones or the one you trusted about how they can access our wallet in case of "unexpected" emergencies. When I mean unexpected, it doesn't mean that someone passed way but that is not the emergency we will encounter so better we can have a non hassle way to covered that emergency.