Since there is 100000 alt coins out there (in the make), it all comes down to Awareness and how large the community of a coin is. Also: can the currency be used in "real life-internet" (webshops etc).
My strategy is to mine some of all. So ye i have doge, cat, ronpaul, litecoin, worldcoin, fastcoin, netcoin en ofc Earthcoin (idd, no mooncoin, dont have faith in that one). It's all in very strong hands, since I only daytrade with max 10% of my stacks. The 90% is for sale somewhere in 2015/2016 maybe.
See what happend with bitcoin. BTC is around for a few years already. When in the early days you had 1000 BTC that were worth 10 cents each, and when it went up to 1 dollar, omg you felt like selling. A shame if you look at the current price (of almost 1000 bucks) again.
Pricetarget for EAC will be at least 1 dollar each next year. So why sell now for a quick buck to pay-off your hardware?
Btw, Earthcoin is my "main" coin for mining now.
First 5 replyers under me, who arent on my ignore-list, will receive some Earthcoins. Post your wallet address.
Last condition is that you havent responded to this topic already