Dear team
I need to know that if a bitcoin holder dies with 100btc. Then what happended to btc ? Useless
If family member knows no problem. What if not
If no one has access to their funds via private key etc then the funds are lost forever. That is one of the benefits and also one of the downsides of bitcoin. It is why all should be sure to be sensible and make copies of private keys and leave them either in secure places or with family members they can trust.