I'd guess it is a sure bet most TSA folks have never seen much foreign currency or have any idea what it is worth. I generally travel with a packet of currency in about 10 currencies:

GBP, EUR, CHF, CZK, AED, JPY, AUS, plus some oddball ones depending on where I am going. The packet is probably about $5K worth, but they'd have no idea. Most of my trips are multi-month long journeys with several "bases" where I stop for a few weeks... often in places with no ATMs.