Decentralized exchanges are the future. In the future, tokens will be issued directly on decentralized exchanges, and the transaction fees will be paid with platform tokens. This way, user privacy can be protected, which is truly suitable for the cryptocurrency world. The only purpose of centralized exchanges is to withdraw funds. In fact, after withdrawing, you can go directly to the bank, such as buying and selling Bitcoin at the bank. For altcoins, you can directly exchange them for Bitcoin to withdraw.