Personally I like the idea of a nice very round number for the total coin supply, e.g. either 10 million, 100 million, or 1 billion.
100 million could be the optimal number of coins, based on the following logic:
Sample near-term target price per Elastic coin: around 10 cents in Euros or USD, around 0.2 mBtc or 0.0002 Btc (without too many leading zeros)
That would be cheap enough to psychologically feel easy to buy but not Dogecoin levels of needing an astronomical number to pay for anything much.
Anticipated (wild guess) market capitalization: perhaps heading towards a $10+ million level before very long ... which would hence make the prior price target per coin occur
Also, perhaps the interface might eventually show the current equivalent price in fiat currencies as well, sometime after the coin is on exchanges giving price data. (I'm thinking of newbs kind of like me. I have been using cryptocurrencies for a year now but still find it easier to think in cents than in satoshi or even mBtc, especially as the value of Btc fluctuates more anyway).