"I regard the world's central bankers as smart money. That's enough for me."
Seems like you need to do little more research, central bankers are not 'smart'. If you do some checking you'll find they tend to buy at the top and sell at the bottom. The central banks in Russia and China buy their own production, so it's not going from "east to west", it's an absurd myth.
Where do you get this stuff from? I'm glad you're not my lawyer.