It was never a real currency. It is always tagged to dollars.

> 1 bit coin is worth... $

And the bitcoin price of things bought with it fluctuate based on that.

That's not a real currency. While the cost of goods may fluctuate, they don't due to the value of the currency being pegged pegged to anything but the goods and the intracurrency cost of the production, marketing, transportation, and risk / profit.