What will happen??
No one will have the BTC address. Hence will them isolated?
In FIAT, people can handover money to someone.. So, i predict BTC will be disappeared gradually.
I think in that kind of case, your bitcoin would still hang in your wallet. The best thing to do is to make sure that atleast one important person who you trust the most would know how to access your accounts. You should have atleast a single person to share your private keys with.