Monero is the most private, fungible, and fair coin. Its cryptography was praised by many Bitcoin developers. It is the only cryptocurrency whose transactions are private by default (and cannot be sent without mixing). It uses the CryptoNote protocol to safely and efficiently “mix” with other segments of the blockchain.See full review

Stellar (XLM) is an open source payment technology with many similarities to ripple. Like the Ripple, Stellar is a payment technology aimed at connecting banks, payment systems and people, integrating for fast, reliable and virtually no cost. See full review

Great community Transactions verify quickly Doge mascot More lighthearted than other currencies Low price (both pro and con).See full review

Lisk Coin is a public blockchain platform that offers decentralized blockchain applications. Be fork from crypto by Max Kordek and Olivier Beddows in early 2016, this coded coin allows developers to build a variety of applications on the Lisk platform by developing external strings. I find it quite potential.See full review

It will all come down to if Bitcoin can become "Digital Gold" indeed. As written by Satoshi, it's only use is actually as a payment system. This is something which every other crypto currency can do, obviously. So it will all depend on how much value people give BTC in the long run. Will other altcoins break free from Bitcoin, ofr example? Will Bitcoin become an asset which is values as the old-timer, or mother of blockchain technology?See full review