The crypto community is getting bigger on daily basis, new institutions, big investors and country leaders/government are taking into use Bitcoin and some other crypto currencies. Because the system is not centralized, there are still some people who are skeptical in investing.
More country adoption, which means more CEX will open for the legalization of Bitcoin.
Using CEX is very convenient, especially if you are new to trading, compared to DEX. If the adoption continues, the number of CEXs will grow, and possibly, there will be no equality between the types of exchange.
The problem of DEXs currently faces problems like lower liquidity compared to CEXs, and also a non-user-friendly interface. If DEXs fail to solve scalability and user experience problems, CEXs might retain dominance by offering reliability and regulatory safety.