Yep my advice is to buy at the bottom, then sell close to.. or at the top :D
Lots of Hematite (forkin)truckloads of Magnatite, spread out in different deposits = many different EPA approvals required = need to be a little patient......
To make it easy though the chinese have/are dropping $500m+ into gbg this year alone(correct me if the figure is slightly off).
They is be smarter than me so I didn't mind going all in :D