I guarantee that it would become a waste if the bitcoin that was in your hands went nothing because of a tragic incident. I recommend to anyone to have a secret box in your closet where all your secrets are in there. Most of the time, your family will be the one who will look at your stuff when you die so once they see it they would know that you have something that should be taken care of and could help them too. It's already 2020 but the acceptance and transition of cryptocurrency in the world is still slow, maybe a second plan on restoring your money and keeping it alive would be a better option than to keep it to yourself all along.