I'm not a bitcoin fanboy - but I see this sentiment around a lot and I'm not sure I agree with it. The claim is that the value of a currency is supposed to also be somehow related to its utility in acquiring goods and services. And if this isn't the case - then people will go off it.
When was the last time someone acquired a good or service with an ounce of gold? Perhaps we shouldn't consider gold a currency? Well I'm fine with that. Bitcoin probably isn't a proper currency yet either (in the sense that people aren't exchanging much with it yet). But not being directly relatable to utility in exchange certainly hasn't hurt gold in recent history. So I don't see why necessarily it will be a problem for bitcoins.
When was the last time someone acquired a good or service with an ounce of gold? Perhaps we shouldn't consider gold a currency? Well I'm fine with that. Bitcoin probably isn't a proper currency yet either (in the sense that people aren't exchanging much with it yet). But not being directly relatable to utility in exchange certainly hasn't hurt gold in recent history. So I don't see why necessarily it will be a problem for bitcoins.