The drilling so far at Nymagee has been promising, but AMI has...

The drilling so far at Nymagee has been promising, but AMI has been always been and still remains a calculated risk. Hera is a nice money earner and hopefully will be able to fund the development of Nymagee in the near term as well as pay out Glencore with cash to spare. My reasoning is that as markets improve Ami will be in a good position to fill the demand. Cobar has been operating for decades and still going strong.
Copper stocks are currently high and the price is low, as are many resource stocks, but copper will always be in demand. I bought in with Nymagee being the primary focus, so have taken a long view of this holding. Your points are more than valid, and are things any investers need to carefully consider. Degree of risk is different for everyone.