Regarding the OP:
So, every now and then I see a post about the beauty of a decentralized exchange. Well here's the thing. You can't get USD on a Decentralized Exchange
No but you can trade into it (BitUSD) from bitcoins instead of trading into bitcoins from USD. From there you are just going to trade back and forth anyway, so who cares if the egg really did come before the chicken.
, adding new coins to trade will always be a headache, and since there won't be any censorship, scamming with new, random, 2 day old altcoins will be abundant
In BitShares it costs 500,000 BTS (which is a big chunk o' change) to register a new tradable asset (in order to keep the spam down)
Decentralized Exchanges sound good in theory, but in practice it just isn't plausible.
The BitShares webwallet was once a theory, but now it is a reality
https://wallet.bitshares.org/Really? Do you guys really believe Bitshares? It acts likes a pyramid schemes in China, some people yalling that BTS will go to 500$ everyday.