When the communists in Russia were sending agents abroad after the revolution, they found they had no easy way of moving money to their western agents, but plenty of jewellry from arrested capitalists. So female agents simply wore the jewellry openly and no one gave a second look. Arriving with bags of notes would have attracted attention.
I imagine geting your krugerands put on a chain would be cheap and unlike decorative jewellry, not lose 75% of it's value the moment you stepped out of the shop.
The Sock