AM-PT SHARE
- Currently about 2.5 BTC/share at BTC-TC
- Recently generated 0.038 BTC/week in dividends (this was the highest dividend ever)
- After one year of dividends at this rate = 1.98 BTC
- LOSS OF 0.52 BTC
In other words, if you purchase any of the above items in the hopes of "earning back" your cost, you won't. Of course this does not include the fact that you can sell your 7970 GPU in the future (but a year from now how much would it be worth? maybe $100?). Others would say you cannot sell the USB Block Erupter after a year because it is a uni-tasker without any other purpose. Finally, you can sell your AM-PT share too, and it is very difficult to predict what the sell price would be at that time.
This does not factor in possible rise of share price and rise of BTC/(USD/EUR/YEN/GDP/whatever).
If you bought BTC with fiat and then bought ASICMINER shares you might see a faster ROI in fiat than in BTC. Assuming BTC keeps rising against fiat.
It is quite plausible that many newcomers who can't make a profit in mining will see ASICMINER shares as an alternative. Which would logically increase the price.
Nothing is certain of course, anything BTC related is a risky investment (some might call it a gamble).