I will rather say " never trust in exchanges"
Because if you said  "never trust top exchanges, it means that you want to trust lower exchanges, this is much worse.
Exactly, exchanges, moreover the CEX is only a platform for us to trade and to do such transactions, but it doesn't mean to be our wallet to be used for long-term investment. For, this will be very risky, not only for our asset owners but also the security. Trusting them 100% will be worse again. But we can't do anything if we are still doing trading activities, I will prefer to use top exchanges than small exchanges. But once more, I will take out the profits or some of the profits from the exchanges to my personal wallets or even cash it out. Actually, this also relates to money and risk management to make our funds much safer, a little bit safer.