Currently, bitcoin stores some sort of value.
The most obvious store is the electricity from the miners, which is roughly a function of bitcoin difficulty, and of course the price of electricity where you live (and the efficiency of your hardware etc).
This aspect of the value of bitcoin reflects the bare minimum value. Bitcoins should be worth at least the cost of electricity miners put into their creation.
No, sorry. This is totally false.
The only value a bitcoin "stores" is the purchasing power it retains, which purely a function of supply and demand. The cost of electricity has little to nothing to do with how much a Bitcoin should cost. To illustrate, imagine if suddenly tomorrow everyone's electricity costs 100x more. Does that mean a Bitcoin must sell for $500 (given current price of $5)? No.
Supply and demand is all that matters.
The extent to which the cost of electricity power plays a role in the price point of a bitcoin depends on how that electricity is obtained and how much of it needs to be used to generate a given amount of processing power. I can't wait til the Radeon 7000 series comes out, and maybe someday really soon I can afford FPGAs. Solar panels are in my future and if I can a windmill going in my backyard, I will do it.
I think I should clarify that I actually believe that power consumption plays a negligible role if any in the price of bitcoin. But, as a miner, the more cheaply I can get my base resources (in this case power), the higher my profit margins, at any price point.