My vote is zeitcoin.  I was able to mine a bit of it while you still could and they have been relatively calm for months but they have an active community and the new wallet is working amazingly.  The POS/POW hybrid has been shown to be stable by dark coin and more environmentally stable than massive mining farms.  I just bought 40 bucks worth and its sitting there gaining interest. With more support maybe I'll be able to buy something with them someday lol. Oh yeah and the value has roughly doubled in the last week so that's nice too.