The major driving force for centralized exchange is the volume. If that is removed, I believe interests will be shifted towards decentralized.
Well, it is still very early and what the future holds for decentralized exchanges, is in going to be surprising.
Volume is the people here, they are giving the volume in any exchange, and they can also do that with decentralized exchange.
They are more confident with centralized exchanges because they trust it over decentralized exchanges, that's the only thing, if decentralized exchange will improve and offer some good security then maybe we will see more people trading in the platform.