Paul Ford for Businessweek:
Maybe Bitcoin’s devotees are right, and it’s the currency of the future. Or perhaps it’s a ridiculous joke—a speculative, hilarious enterprise taken to its most insane conclusion. Given that the founder is nowhere to be found, it feels like a hoax, a parody of the global economy. That the technology used to implement it has, so far, shown itself to be impeccable and completely functional, and that it’s actually being exchanged, just makes it a better joke. The truth is, it doesn’t much matter if it’s a joke or not. It works.
See also: Chris Dixon’s brief thoughts on the matter.