It's only to make everything fair for all.
your credit card may have a $100k limit... but without the ability to contact the credit agencies... it’s just a piece of plastic
Bitcoin trivia: Mt Gox gets its name from "Magic: The Gathering Online Exchange" back from when it used to be a venue for trading cards.
Maybe that's the problem. Crypto-currencies like BTC require the construction of purpose-built exchanges in order to achieve their full potential.
And BTC has potential. It's not a 'printable' currency - the creation of each unit requires non-trivial work. More importantly BTC is not a fiat currency: no-one is forcing anyone to use it.
Also: BTCs have real world value, albeit of a rarified kind. BTCs can be used as cypher-keys or one-time-pads for the secure validation of long-range transactions. Using BTC as money is a subset of that ability.
BTC is an alternative currency with unique properties. Those of us trapped in the global fiat system should support the existance of non-fiat alternatives; even if we don't use them ourselves.
It's only to make everything fair for all.