Well, I should think a degree of financial privacy would be accepted. Why do you have to declare your personal financial matters to everyone?
The only people who needs to know those details, would be the tax collector / government and your auditor doing your books.
I am sure, nobody wants to tell thiefs and hackers about the big stash of coins they bought from a auction, and being from a controversial origin {the coins} it might become a target in future.
I think, I would keep it a secret too...
If the tax collectors and the auditors know then its most probably fine.