I think
NEM is probably the best pick for the next big thing
There are many unique features that are new to NEM, such as:
- first use of Proof-of-Importance (PoI) as a consensus algorithm
- first use of eigentrust++ in a cryptocurrency for securing the P2P network
- encrypted messaging
- first use of remote (proxy) harvesting (harvesting is our analog of mining)
- first use of transaction spam protection
- first crypto with an address book on launch
- first crypto with multisig on launch
- first crypto with 1oz 999 pure silver coin to be minted at the Perth Mint, given to every stakeholder (along with matching assets, essentially creating a silver-backed currency in addition to the main currency, XEM)
- first crypto with an egalitarian distribution to over 1500 individuals
- 4 exchanges confirmed to add NEM at launch (BTER, Poloniex, Bittrex, and BTC38)
- NEM Decentralized Autonomous Organization (DAO;
https://forum.nemcoin.com/ideas/nem-community-fund-(aka-nemtopia)/) for managing a community fund where everyone can vote and voting is based on importance scores (used as a part of PoI)
- open source client (
https://github.com/NewEconomyMovement/NemCommunityClient) and future open sourcing of the core server
- test-driven development with over 3000 unit tests in the core alone
- SHA3, curve Ed25519
- 60s block time with low variability due to a 60 block weighted, moving average
- progressive transaction fees
Additionally, more information can be found on our wiki page:
http://en.wikipedia.org/wiki/NEM_-_New_Economy_Movementand
http://motherboard.vice.com/read/this-cryptocurrency-doesnt-want-to-beat-bitcoin-it-wants-to-beat-the-economyI'm one of the NEM devs, so I could be biased, so please read more and judge for yourself