I've been spending alot of time researching. I am no expert, but I've found the following interesting facts when looking for a good coin
1) fast transaction time - when you buy something you want a coin that confirms quicker than the 10min + of bitcoin. It seems to me (I may be wrong) but Earthcoin 10-30 secs (alleged) is really fast! Fastcoin and Worldcoin are fast too.
2) best to mine. Seems that Dodgecoin is good for that. But there are other coins out there that are profitable to mine
3) unique properties. Some coins have unique qualities that make it worth having:
- datacoin - it encrypts stuff from the internet for ever supposedly
- anonymous coin - speaks for itself
- tagcoin - gives you rewards
- gridcoin - lets you mine and contribute to science
- curecoin - not release yet, but supposed to help with cancer research and stuff
- giftcoin - because it's used for gifting
- stablecoin - because its stable
- quarkcoin - I am still researching, but alot of people back it
- and others - there are loads more:
http://com-http.us/ is a good site to list all coins
4) beware pump and dump coins
5) look for coins that have good marketing and support from good developers
Like I said I am no expert - but these look good long term. But you never know, and there might be a new coin in the making...