Just do the math... Those shares are never gonna pay off. With a diff increasing of 30-40% each retarget, not even the ASICs are gonna pay off (at least not at current prices). What are ppl thinking??
(OT: Is 20USD/GH still the best you can get?)
When ppl really wanna get rid of they're money the should better give it to unicef.
Share's don't "pay off" in terms of dividends. If you assume the asset cost will go to 0 and you're trying to collect enough dividends to "pay" for your initial investment, you're doing it wrong.