Digital Cash has intrinsic meaning, but is a mouthful.
I'm just thinking about it from a merchant's point of view. A merchant is only interested in knowing if it's "credit money" (which to them is digital) or "cash money" (which is immediate). If you say "digital cash" to a merchant thats like saying "credit-cash" and loads it with ambiguity.
i.e. To a merchant the word "digital" equals PDQ machines and that means fees, adverse chargebacks and all. So it has negative conotations.
To make it unambiguous (for the merchant) I think it should be cash.
Private-Instant-Cash.
Us - "Hey there, how about you start accepting DASH? "
Merchant - " DASH? what on earth is that? "
Us - "Well, essentially, its digital cash"
Merchant "Oh ... ok... I dont get it, isn't VISA digital? or Paypal"
US - "Well... not really, its really more like cash, here's why...
Whatever the outcome, forever in his mind Dash is implanted in his brain as digital cash. Instant phonetic association.
Now read that again, but with Darkcoin.