If you ask me personally, I'm not convinced the number of base units in existence is an important metric for any currency. (In the US dollar for example, this is called the "monetary base", and neither fans nor detractors of American monetary policy point to it very often.) It's just an illustration of the fact that the value of Bitcoin can't come deterministically from its restricted supply - if it did, that 15% supply increase would equate to a 13% loss for all holders.