That doesn't make any sense at all. Why mine while unprofitable? when you can just buy the coins if you wanted to invest in them?
For example:
to mine 30 btc, you'll need to pay $200 in electricity (roughly)
why mine, when you can just buy 30 btc, for $195 (@ $6.5 per coin)?
...or you could mine even if the price went under $7... just waiting selling off until a higher price.
if the price is under $7 for a longer time, the difficulty would even be lower.