It is indeed hard to pin down the best altcoins among the lot of over 500, so please don’t mind if we missed out your favorite cryptocurrency. Meanwhile in our opinion, the following are the best altcoins to trade in the year 2015, a list based on their price stability, future projects and mining profitability. We have left out famous cryptocurrencies like Litecoin, Dogecoin, Peercoin and Ripple deliberately to make some space for new altcoins.

Dogecoin Dark

Dogecoin Dark is presumably a full-anonymous version of Dogecoin, which is further backed by a decently populated community. The cryptocurrency has steadily traded sideways for most of its trading period, but only recently it has been encountering a relatively larger trade volume. It is currently being traded on a number of cryptocurrency exchanges, including C-CEX and BleuTrade.

Mining-wise, Dogecoin Dark manages to stay among the top most profitable mineable coins (based on the data provided by CoinWarz.com).

Unobtanium

Unobtanium is among the few altcoins that has displayed minimum price fluctuations since the time of its launch. It hasn’t been premined, nor have been indulged into any sort of IPO, therefore justifies itself as one of the safest investments to hedge Bitcoin or USD. It is currently being traded at Cryptsy, MintPal, Allcrypt, Coins-e, Comkort and several other exchanges. It is also listed as one of the top profitably mineable coins on CoinWarz.com.

Digitalcoin

Digitalcoin might be one of the most mining-friendly altcoins of all, thanks to its block rewards that reduces at a sluggish pace. On the trading front, the coin has been trending sideways for a long time — again because of its performance optimizability and ability to retarget mining environments.

Darkcoin

Since its inception, Darkcoin has grown from being an idea to an actual anonymity-offering token — much credit to its strong and aim-driven developer Evan Duffield. The fundamentals around this coin seems to be the most optimistic than all, whether it is for making transaction anonymous or, very recently, fast. Overall, this makes Darkcoin one of the most worthy cryptocurrencies, asking to be held for a longer term while awaiting adoption due to positive development feedback.