This thread is about a decentralized cryptocurrency exchange. It's about putting in one coin, trade for another coin, and cash out that coin.
No need for any centralize cryptocurrency such as: Bitcoin, NXT, Bitsharesx, or CounterParty
I don't get what you're saying. Are you claiming that those cryptos were centralized?
With multigateway you can exchange in a decentralized way. Of course you need some NXT because it's on top of the Nxt Blockchain.
Please be more specific about what you're meaning.