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.
If a person with BTC and have a sudden death his/her BTC will still be in the network, unless he/she saves all information about his/her btc on notepad and can be easily access by his/her family. Like me all my online password are save on my pc.
Yes, that will possibly happen for someone who used to manage bitcoin. If he or she had trusted someone about his or her account, maybe that person may use and earn it. They're maybe his/her friends or family. I hope everyone here has been doing that for them not to waste their bitcoin.