BTC  
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buysellbitco.in sounded as if der is some "magic" trick up every experts' sleeve  
I know abt supply and demand and confidence but fail to understand how an expert will be able to judge dese 2 factors correctly and use it to his advantage.
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I am glad you took in the right spirit....your question not just for bitcoins but for any commodity or security which is traded will not yield any meaningful answer. If you ask Warren Buffet, he will have a very simple answer Greed and fear.

An expert today is a fool tomorrow....John Paulson is the apt example for the present context.