Total of unique bitcoin address doesn't reflect whether bitcoin will fail or not. If we talking whether bitcoin will fail or not, we should see actual bitcoin adoption, acceptance and scaling/upgrade instead.
Why do the number of addresses fall every now and then? I would assume the graph should have gone up all the time, no? When people lose interest in bitcoin, I would have thought that they would just uninstall their wallet apps or something. Are they deactivating their addresses as well?
I think when the balance is empty, blockchain.info counts it as inactive/used address. Also, deactivating address isn't possible.
in my opinion so unequivocally can not be answered. The fact is that, of course, the number of registered addresses does not guarantee growth, but on the other hand, a surge in activity in this direction indicates that the world has an increased interest in BTC, this in its turn indirectly indicates the potential for growth in the future.