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.
Only that is indeed a way to pass on assets to heirs when we are gone, but I do things a little differently, not only giving keys but also providing understanding and knowledge about the Bitcoin investments that I have done, I hope they will have the same goal as me and one day they will be able to continue what I have been doing.
I can because my family members have grown up, and I think they deserve it.
I like how you emphasized sharing the knowledge and ensuring they have information about Bitcoin. Granted that you will be able to pass down your Bitcoin assets to your heir, it will all amount to nothing if they do not know how it works and how to make the best use of it. It will be wasted and all the hard-work you did for btc will be nothing to them if you do not share your knowledge as well.