Well this issue needs to be discussed by every bitcoin user bit no-one thinks about it. As giving your seed phrase might be risky but what if you put it on a safe place and mention it in your will which much be disclosed after your death.
this is a great way to write a passphrase code or bitcoin storage password into a will and save it in a document. only designated family members can open the will. other than that it must be strengthened by using a lawyer or attorney so that the document is safer. this is a good step to secure assets