So to all you "Investors" that keep claiming 5 BTC is low, why aren't you snapping up all these shares?
At the risk of being cheeky, they aren't snapping up the shares because they dumped them all at 4.7-4.9 yesterday.
I disagree with your statement that share price won't drop to 4.5 once it passes 5; all I can see are those "hold, spartans!" memes on /r/Bitcoin when BTC/USD was $200+.
I should also mention that I'm not trying to antagonize people by being pessimistic. The "sky's the limit" crowd is a mixture of (a) genuinely optimistic investors, and (b) people trying to keep the price high while they cash out. Devil's advocates are necessary in times like these 
Care to take a guess as to the (a):(b) ratio?
90% of ASICMINER shares aren't even on exchanges. I think the owners of this 90% can largely be presumed to be genuinely optimistic investor types. If we wanted to be overly pessimistic, we could presume that any shares that are moved to an exchange was done so (at some point) for the express purpose of selling them.
So let's call it a 9:1 ratio?
-helixone