Decentralized Exchange (DEX) is the future. For now, a lot of people still don't appreciate these decentralized exchanges and they have some reasons for it.
Like why they intend to stay using centralized up until now.
I'm not telling centralized exchanges are really bad, but there are just pros and cons to both centralized/decentralized exchanges. Depends from your goal if decide which one to use.
I really think that decentralized exchanges have not really perfected their technology yet, which is why centralized exchanges are still going to be the leaders of this market when it comes to the volume they manage, however as governments impose more heavy regulation to this industry and centralized exchanges are forced to comply the greater the chances decentralized exchanges become more and more popular, and they can finally begin to rival the volume of their centralized counterparts.