How about you print out paper wallets and then keep them in a safe? When you draft you will, maybe you can have the password in it and it would be given to your heirs when you die. I think this is better than having your bitcoin in exchanges which might ask for email logins and 2-step auth to access the fund.
the thing you are looking for is called digital locker.., eg :
https://www.passwordbox.com/legacylockeryou upload your documents, or passwords to it and set nominee or heir and then after you die, they can access that account which contains all the accounts and their passwords and digital copies of your documents.,
there is another site where you can upload scanned documents too, i cant recall its name , but i hope you get the idea.
First time I heard about this. Might look into it.
I would have asked why you would be thinking of death when you are apparently just starting your life, then it dawned on me that death is inevitable. I still wanna live very long so death is the last thing on my mind right now and I know God's gat my back but if I am to do what you wanna do, I would just write a will with my lawyer then open a safe with a good bank to keep all my wallet details which are to be disclosed to my lawyer in the presence of my named nephews and nieces and all beneficiaries only when I am deceased. In that way, you should be able to share your profit with no kwams.
True. You could end up saving the best for last, toiling so that you'd have a good life and then you die and did not enjoy the fruits of your labor.