Yes, it's intrinsically useful. See https://en.bitcoin.it/wiki/FAQ#Where_does_the_value_of_Bitco... for a longer reply.
Edit: Btw, the USD is mostly has value because it's being used (useful), so yes, that's what currencies have going for them. The USD just has it so much easier as it's backed by a government.
If these people keep running around with blindfolds on, it might be time to put up some bumper walls.