Does the concept of a blockchain introduce a violation of privacy? Per my understanding, in a blockchain system, all transactions are recorded on an immutable ledger.
Given this, if you know your friend's public address, wouldn't it be possible to figure out the collective total of their holdings? Isn't that a violation of privacy?
Given this, if you know your friend's public address, wouldn't it be possible to figure out the collective total of their holdings?

I can look at the transactions associated with the address if I know the address which I assume my friend told me.

Isn't that a violation of privacy?

No if my friend told me the address it's not violation of privacy