>> that value is in allowing people to make exchanges they wouldn't otherwise be able to make.

Well, you could say the exact same about every currency. If you are a chicken farmer, it is easier to buy a pound of pork for $5 than trying to trade your chickens for a slab of a pig (i.e. barter). All currencies provide value, since they are a lot easier than barter. The question is not that, it is whether or not they are based on something of inherent value.