Not your private key not your money.
Most of the time a trader skips this statement from their brain and end up being a victim of scam, exchange is not a place of storing funds, that's why numerous news about exchange hacked had been sprouted around the space, not that the exchange is weak enough to maintain security policy but its easily hacked at any given point in time unlike wallets neither web, hardware nor software wallets.
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this is a principle that must be understood.
many beginners use exchange wallets to make trading easier, without thinking about transaction fees for sending from private wallets to exchange wallets. whereas the risk is even greater because exchange wallets tend to be the target of hackers.
be wise in dealing with this. transaction fees incurred are proportional to your security, so if you don't care about security then you will definitely ignore this.
One of the reasons why people do tend to choose not to make active transfers from exchange wallet to their own personal crypto wallet not only just for the hassle but also with the fees.
Making transfers actively will really get some amount of fees specially now that $6 is the average fee atm for bitcoin since the network is clogged.Imagine on making
transfer back and forth and how much you do spent with just for fees alone but if you are a whale or do have lots of money then these amounts wont really be that
much of an issue.Some whales do value much of their holdings for sure and this is should how people do have this kind of mindset.