bitcoins true value is not $1 with $640 speculation, meaning bitcoin can drop and stay dropped to $1.. it can swing up and down, but on average it will be at or above mining costs because smart miners will refuse to sell at a lose, thus keping the prices on average above mining costs (excluding the random crackpot that dumps coin for a temporary crash..) but as i say ON AVERAGE the bitcoin value and mining costs do tally..
Franky, just read my most recent post. You need to learn a thing or two about production cost, and what it really took to product ALL BITCOINS ON AVERAGE.