Hmm, interesting well, as you should know the key is to access the assets, and that key cant be shared if you want security. If you've lost the key or anyone doesn't have it he cant access the Bitcoins in the wallet. So you need to pass the key but there is a huge risk haha, as I had mentioned already if anyone has the key he can withdraw all the funds. More interestingly haha in reality people store Bitcoins for their hiers. I use to keep my keys mostly in a place and few of my family members know where. As you know haha Death is the reality and it can be on the head anytime.
The real problem with Bitcoin
BTC is that if you share your private key with your near and dear ones like your wife and kids, there are chances that they may misuse the funds and even withdraw them before you die.
On the other hand, if you choose not to share the private key with them, you never know if you die all of sudden like in an accident or heart attack and nobody will know those private keys and hence that bitcoin will be lost forever.
I think, in the future many rich families will become poor when someone in their family dies suddenly without transferring the secret private key to anyone.