most of those who still use centralized exchanges are those who trade. they use, but I'm not sure they still keep their Bitcoins in a centralized exchange. the experience has served as a warning to anyone not to keep their Bitcoins on exchanges, or to do so at their own risk.
some people know Bitcoin from trading, even centralized exchanges that make marketing on social media. the brand campaigns for crypto trading as a whole, not a benefit from the use and ownership of Bitcoin assets alone.