Today I read an article over on Lifehacker about what happens to your domain when you die. It goes over the expiration process, how to remedy that problem temporarily and then a solution to the problem that we need to consider and implement.
It was a great article being that I own about 20 domain names myself.
Check out the article here: https://lifehacker.com/what-happens-to-your-domain-when-you-die-1840265975