What is centralization and what is decentralization? To put it simply, if one person is in charge, it is centralization; if a group of people is in charge, it is decentralization. Having one person in charge can be unsafe; just think about how many bank executives have issues due to the concentration of power. In contrast, having a group in charge is relatively safer. If we want to get more complex, I actually don't understand it very well, haha. However, if you put your funds on the chain for trading, that is decentralization. But how do we ensure safety when we put it on the chain and how do we trade? This is also a problem. At this point, we need a platform, which is an exchange, such as Binance, which is a decentralized exchange.