BTC will fail or much much much worse become the money of enslavement if privacy is not added.. Unbreakable privacy..
There may still be some bitcoin wallet addresses that are incorrectly blacklisted from that protocol even though they have never transferred bitcoin to an exchange and their owners are unidentified. They might not have done anything wrong, but the fact that they are unknown indicates that they maintained their privacy to a degree that prevented anyone from tracing them. What exactly am I saying? What are some users trying to accomplish when they transfer mixed bitcoin to centralized exchanges where they are verified and claim to need privacy?
Avoiding centralized exchange is the first step in preserving privacy because that is where government trained security agents first threaten to obtain user information prior before arresting them.
Bitcoin isn't a very secretive private network, but no matter how hard they try, the satoshi path will continue until it is completely unreliant on anyone.
Privacy is a must.