Many may say that holding bitcoins in an exchange account is risky, you are not the only user who is holding their investment in an exchange account, there are much bigger investors than you who have left millions of dollars in exchange accounts. Since they took this risk, you must also take risks, and without taking risks, progress in life is not possible.
Keeping your Bitcoin on the CEX exchange is not taking a risk, is suicide. You probably allowed a third party to control your Bitcoin, and you can lose your Bitcoin from the CEX exchange if they decide to take your Bitcoin or if there is a hack on the CEX exchange where you kept your Bitcoin. You can wake up one morning to discover the withdrawal function has been disabled and you can not withdraw your Bitcoin, since it is not your key, not your coin. Since the transaction fee on Bitcoin is high now, it is only advisable to keep our Bitcoin in the CEX exchange if we are accumulating Bitcoin with the DCA strategy but when we have accumulated the Bitcoin that is worth $500-$1k you can withdraw it to your non-custodial Bitcoin wallet, where only you have access to our Bitcoin.