Its cheap and will remain so for a long time as there's a HUGE supply already created: currently at 77,137,774 Eth coins. Yes thats 77 million folks!
Ginormous Eth Bag holders that are bailing out on you.. So you can always dream of $50 a coin, that's would amount to nearly $4 billion market cap, for a coin that doesn't even have proper GUI client..
https://etherscan.io/stats/supplyYou could also say that there are already a 15
billion mbtc supply available. 1 BTC being equal to 100,000,000 satoshi is also totally arbitrary and this definition exists only because people collectively agreed to it.