Xbrick is an exchange wallet that you can store your coins safe and sound. Traders will enjoy a discount for Tx fees while trading if they have Xbrick token on their account. Having a secured trading platform like Xbrick will make us at ease about our digital money stored in it.
That is a big NO, Exchange wallet is never a safe place to store your coin, external cold wallets are still the preferred wallet to store your cryptocurrencies. Nothing is secured now a days , even banks get hacks and there were so many cases already of hacking on different exchanges, even the top ones. Let's learn to be more vigilant in storing our coins.
All you said is true mylifeisfullofalts nothing is secured nowadays even the slight security issue on every exchange can be subjected by a hackers attacks. So we must be observant and don't always rely on exchange to be your crypto storage. You must use a hardware wallet just to be secured and back up all of your files just to be secured.