Keeping your Bitcoin or any of your crypto asset in an exchange is a very dangerous risk you need to avoid because if the exchange is hacked, just know that their is a higher probability that your asset will be stolen. We saw what happened to FTX a few years back and how investors lost their asset even though they are trying to pay everyone gradually, but that is a risk we can easily avoid if we store our asset in a self custodian wallet where only us have access to it, because in an exchange, you dont have the key to it, and they are exposed to hack, so it's an avoidable risk.