I guess it's about time to add Counterparty XCP, now that it surpassed MastecCoin in coinmarketcap (7th position now).
Having similar function as Mastercoin, though:
* being fully community based and distributed (almost no known heavy holders here)
* issued via first massive Proof-Of-Burn process (more then 2124 BTC are lost forever, being converted to XCP)
* having the first worldwide *working* distributed exchange and asset exchange (smart property)
* listed on poloniex exchange
* traded volume is 4x higher then Mastercoin
I guess it warrants a place at "BIG and IMPORTANT CRYPTO'S" section

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Thanks!