Get over the hype and take Bitcoin for what it really is: a fascinating experiment that has, so far, withstood the amazing barrage of publicity, hacking attempts, legal uncertainties, and remains valuable for reasons completely contrary to everyone that says it's worthless. It may become worthless one day, but consider the possibility that Bitcoin is disproving all your wildly oversimplified assumptions about what makes something valuable. It is completely different than anything else we know, and there's plenty of reasons to believe that it could succeed as much as it could fail. (and in many ways it has already succeeded as a proof-of-concept of the idea of decentralized currency)
Why does gold have value? Nothing is backing gold, and if it was for its material properties alone, its value would only be a fraction of $1,300/oz. Yet it maintains value because of its properties to behave as a transferable store of value: scarcity, fungibility, density, identifiability, etc. Bitcoin shares a lot of those qualities and adds some new ones: ease of transfer over the internet, negligible transfer fees, fungibility, scarcity, storage efficiency, near-anonymity and built-in escrow. I don't think it's any more ludicrous for Bitcoin to have value than it is for gold to have value. And in the end, when I want to sell WoW weapons, buy webserver space, or play a few games of poker online, why would I use credit cards or paypal, which all require me to remember log-in creditials, give away personal information to be [improperly] protected by a third-party and/or pay a bunch of fees. There's plenty of value in being able to pay people across the world, instantaneously, without sacrificing your privacy, and without paying any fees. Why is that not valuable?
When you want to bash Bitcoin by saying it has no intrinsic value, ask yourself this: "what other system of payment/transfers allows someone to move $10,000,000 worth of value, to or from anywhere in the world, 24/7, nearly instantaneously, without fees, can't be debased or printed, irreverible, and without anyone being able to freeze or seize it (without direct access to your wallet)?" Regardless of its downsides, that's pretty f***ing powerful. There's a reason it's "could be a big deal."