Agree, no matter how good the exchanger is and even though our funds are guaranteed by the exchanger, it's better not to store our coins in an exchange wallet. We only function as a place for transactions unless we are daily traders.
Sure. Exchanges are not designed to store your coins for a long time. Only trade and then not very large amounts. If you have accumulated a lot of money on one exchange, then you should withdraw some of it to another exchange.