antoniob Fair enough, but as I said, I couldn't care less about this. If a border agent asks me, I'll be truthful and upfront. That being said I never carry more than $10,000 (USD/EUR mix.) Anyone lying to border agents are doing so at their own peril.
Exiting Russia I am always asked how much cash I have. Only once did they ask more questions and do a deeper inspection. But again, I was open and honest, offered my phone to them to look at pictures of the items I was leaving with in my checked baggage (Soviet era.) After a few questions I was on my way.