I know that there have been dozens and dozens of threads on this forum asking for a decentralized exchange to avoid another MtGox crisis. This is important, and many attempts have been made to achieve it. I believe the answer is here, or atleast, is on it's way.
OpenBazaar, more than being just a market for goods and services, it could also serve as a distributed network facilitating currency exchanges. Here's a proposal on how it could be done:
https://gist.github.com/drwasho/aa6ab79e92f2a876073eThats like asking people to trade stocks on ebay. Dont think its gonna jive
You can also say that it's like a distributed localbitcoins.com
That's only one of the possible ways to do it, but real-time trading, or something close to it, is possible on OB too. Though, there is really no way to get fiat into the system without any cetralized intermediary. I'd rather that than lose money just because an exchange lost it's reserves.