If a share,asset, or token is considered a derivative then yes. bitpotatochips and bitcurry and please dont use the word deriative instead use some 3-4 word name. Just because something exsits in XY or Z doenst mean you should accept it or that it is ok or even good.
Any DEx that is not natively integrated into the blockchain of a given token will have to use derivatives of that token for trades on the exchange. Since Counterparty has native integration of Bitcoin, Bitcoin can be traded directly on the Counterparty DEx. But if you want to trade Litecoin on the Counterparty DEx, or you want to trade BTC on the Dogeparty DEx, you will have to use derivative tokens that are pegged to the underlying currency/security. It's a fundamental limitation, not just something that's done because we can.
Counterparty clone, like Viacoin did.
One main point is that the community of viacoin and clearinghouse are the same, no piggyback, no sudden OP RETURN shortening ect
And again, why do this when there are other, better, faster open-source DEx alternatives out there that do not rely on the kludginess of Counterparty?
It's like, say, somebody built a railroad system. A wonderful system of rails and trains that goes everywhere and is used daily by millions of people. (This is Bitcoin.)
And then somebody comes along and says "You know what, I can figure out a way to make these trains fly in the air!" and they do so, and it's wonderful and it makes the trains much better but they can still run on the old rails too, and the people who want to just ride the regular trains still can do so. (This is Counterparty.)
And then somebody else comes along and builds a whole new system of rails and trains, and makes those trains fly too, instead of just building a normal airplane, which would in many ways be better and more versatile than flying trains, which are still tied to the rails at the end of the day. (This is Viacoin.)
So it's "Flying trains that use the existing rails and train stations" (BTC+XCP) vs. "Airplanes that use airports" (BTSX, etc.) vs. "Flying trains that use a whole new set of rails and train stations which are incompatible with the previous rails and train stations" (Viacoin).
Oh, and the rails and train stations for the new system are going to be pre-sold and I'm going to make a lot of money on them. Haha.
We didn't do anything with the creation of XCP that wasn't also done with BTC. And it goes without saying that no one could shut down Counterparty without also banning Bitcoin itself! 
