1. ZCoin- great technology, privacy trend, low market cap 2. ZRX - Interoperability, low market cap, great team 3. Bitcoin Private- bitcoin + privacy= win What are your picks?
Always HODL Ethereum. It's the coin with highest adoption rate and most transactions. Development looks like it's headed in the right direction. I think it's the only currency atm that can take Bitcoins throne.
I'm not a personal fan of Ripple but once the crypto hype is back everything will go up including XRP. But I wouldn't consider it a long-term investment. I always prefer to invest in protocols such as 0x Token.
Looking forward to Callisto fork/airdrop on March 5 at block 5500000. Ethereum Classic got featured as #1 Coin to Watch due to the upcoming Callisto Network "airdrop/fork":