It is very difficult to see forum members holding on to the belief :
I must do a btc roi
Why is it difficult? It's very simple: I believe we are going to make more btc keeping the miners mining than we are selling them.
Yes we have ROI'd in fiat currencies, but we haven't yet in BTC. We paid 0.63
BTC per share and have received 0.21
BTC. This means that we have less btc now than when we started, this is a bad thing.
If we keep hashing at 8GH/s with a difficulty jump of 80% every month, we will have mined 0.35
BTC by the end of april. That's more than the 0.16
BTC we'll have selling the hardware at todays exchange rate. That 0.16
BTC will be even less by the time the sell of the hardware has been made.
If you're meaning to sell these shares to buy into R17, I advise against it. Not that R17 is a bad deal (I don't think so, I have bought shares in R17), but if you sell shares in one round at a loss to buy into a next round, that might lead to continous losses every time a more profitable round shows up. By the time R17 started hashing, difficulty might have risen that much that you would come to the thought of selling those shares to invest in another round again.