We should really choose a centralized exchange that will not cheat or anything else. However, it can also happen in a trusted centralized exchange because there is a problem of greed among the employees who want to run away large sums of money from the coin holders or from the exchange itself. But many people still use centralized exchanges because they find what they want that they haven't been able to get from decentralized exchanges. And I agree that decentralized exchanges need to improve their service to users to have the opportunity to attract more members.