I have faith in Hive and I honestly think exchanges might not be the way to go. I think having bridges into other ecosystems could work to trade in and out because exchanges wouldn't touch something that isn't easy to regulate. It sucks to hear people bash Hive but I think the feeless transaction system can work and Hive has been holding up well for a while now.
Bridges are a good thing I still think mass adoption requires an exchange.
I don't think it has to be a centralized exchange. Having a link to some major blockchains and being able to swap in and out would be enough.