I'm not in Hong Kong and not a commercial pilot - I work in the oil industry. However, I and my colleagues routinely get cold calls from people wanting to invest our money for us
One call I received was from a quite polite guy, and since I was not busy, I thought I would humour him for a while. We finally reached the point where he told me he could get me into low-risk, special investments not available to the the general public.
"Like what?", says I, innocently.
"The Royal Bank of Scotland".
"You mean the bank that single-handedly, nearly brought down the Western financial system?"
End of conversation.
This particular salesman worked for a company that features prominently on a website called
Pissed Consumer 
Very interesting reading.
Caveat emptor, chaps.