Bitcoin was worth something back when others would only pay $.40/BTC. Bitcoin will be useful as an agreed upon value of currency regardless of the exchange rate to other currencies. Bitcoin wasn't created as something to be pegged to the dollar, but as a separate currency all together. Even if you can't change it into USD, it will still have value and will always be useful.
Agreed ,you can buy cloths over bitfash.com and even buy car and lot of other stuffs, this mean the value is slowly backed by physical items..