IBES Report in - WHC is a Buy, page-9

Whitehaven sold their coal at a premium to Newcastle price according to their latest report. My guestimate is that at current coal pricing (i.e. above AU$75), WHC can still make minimal profit and continue on just about infinitely. Last FY, WHC generated 3%+ profit base on its current market cap; WHC share can be attractive to larger funds as means to park their money, as at 3% we are looking at the worst scenario and there's quite a bit upside to the share price.

And in terms of coal's future - don't just think about Australia. Japan for example cannot allow nuclear plants to leak again; same as China, NZ and few other countries that has geographical faults. To ensure their citizen's safety, it'll be either solar / wind, or coal for many, many countries in the world. Coal will probably be phased out eventually, not now.