Now many people prefer to use DEX because they offer financial services for all people in the world for whom bank services are unavailable.
Also DEX allow to earn money for everybody for liquidity providing.
DEX allow to earn money and have passive income. DEX offers many tools that can not offer banks.
Also banks services are not available for many people.
The opportunity to earn money attract a lot of attention to DEX and make them more popular.
Cryptocurrency adoption continue to increase. It means that the demand in DeFi will increase too.