3) Take a look at
Safe Haven. Safe Haven is building an Inheritance Platform that will allow you to do everything above, but with a legal entity that understands crypto and will make sure your funds get in the right hands. Not only will you reassured that your funds are secured and inheritable, but you will also be increasing the adoption of crypto yourself, outside of just investing into it.
It seems to me that Brybro27 raised this problem to discuss the possibility of Safe Haven. But we aren't yet ready to trust our keys to other strangers. My son isn't interested a cryptocurrency, he is a realist and looks at my interest of cryptocurrency as a hobby, but he is able to deal with my notes and with my files on a PC because sometimes he helps me to my work.