Hi Bris 1,
IMO. You should hold until mining.
WM has said that the grade of copper will be 3%+ early years, and if volume is lifted from 3 mt pa to say 5mt+ later on, grades can be maintained.
WM has 20% of his shares in his Super Fund.
Wait for the "Quarterly Dividends" is my bet.
As WM said "Sell, when I sell" - It will have to be a "good" take-over price for him to do that.
cheers,
Max