That's very difficult to determine because the upsides and downsides are so big here. Obviously, unless you somehow trade options and futures, you can't lose more than your investment, which is a likely scenario if the chips fail. On the other hand, even slight delays in shipping from BFL and Avalon (or others) can lead to a massive upside that isn't even remotely priced into the share price at the moment.
Even my analysis doesn't account for the possibility that BFL or Avalon remains off the market for a long time. We know they are shipping _something_ but we don't have any real numbers and don't know the long-term feasibility of their deliveries. Someone may be excused for speculating that neither of those vendors will not deliver by October, in which case the current share price is a steal.
Of course, if Bitfury comes back tomorrow and says "Sorry, we messed up and the chips don't work" then the current price, or any price, is a complete loss.
.b
Right, that's what I mean. I think, meaning, it's my opinion, that the current price is sufficiently cheap enough for me to risk never seeing these Bitcoins again, taking in consideration the profit and dividends if they succeed. I have faith in bitfury. Not as much as friedcat though.