you guys that are jumping into buying these and other large hash machines should punch some numbers in one of the online calculators. Before the end of the summer the difficulty will be at at least 100 million and over 200 million before years end. The get rich scheme will not happen, on the contrary, some of you will never recover the invested money
some of us are hobbyists....and in this for the long haul..... in 2-3 years when bitcoins are $700-$1000 each... tell me about ROI....
you may not understand ROI -
i.e investing with bitcoins ROI may never be reached! regardless of btc/usd exchange rate - if you spend 20 bitcoins and only get 17 back - doesn' matter what the exchange rate is you will still lose on your investment!!!
also, you COULD be better off just spending the money (USD) today buying coins at market price and have MORE coins (possibly) than mining them with the equivalent USD purchase.
for some reason people forget simple econ basics.
risk is risk- noone knows that's why people make projections and guesses