How much crypto is safe to keep on an exchange?

Hi everyone, I’ve been wondering what the general consensus is on the maximum amount of crypto that is considered safe or acceptable to store on a CEX. I understand the common advice of “not your keys, not your coins,” but I’m curious about real world practices. Is it okay to keep a few hundred, a few thousand, or more? At what point does it become too risky, assuming the exchange is reputable? I’d appreciate any personal guidelines or rules of thumb. Especially if you’ve had personal experience with losses or long-term storage, your insight would be helpful, i’m trying to balance convenience and security, between cex and cold wallets.

Thanks!!