As far as i have seen most new people make use of exchange wallets due to their higher level of convenience, although convenience does not necessarily mean security. Storing the wallet yourself is vulnerable to loss of the seed phrase, whereas storing it on an exchange means putting yourself at the mercy of another company regarding the safety of your funds, In other words, the choice between the two options is up to personal preferences and skills of the user. For example I would find trading through an exchange justifiable, but long term storage of Bitcoin inappropriate.

The simple reason why they do that is because they can directly sell their asset without waiting for the deposit confirmation and of course, they don't have confusing about the fee. Many times investors or traders think twice about the fee which they think that is too high. By hodl Bitcoin in exchange wallets, that can cover the fee but that is not a suggestion to keep Bitcoin in exchanges.

We don't know exchanges can stay out from the hackers radar or when the exchanges becoming the target. We should keep Bitcoin in our wallets because that is our responsibility. Remember, not your key, not your coin.

Haha, bro, are you sure? From the recent news, I came across many users leaving Binance for their own safety.
And according to this article here...>> Users pulled nearly $3.8 billion off Binance in roughly 10 hours. So isn't this enough for us to make sure people are also losing their trust in even Binance Exchange, even though we know it's the world's biggest crypto exchange? The fact is that, with the passage of time, people are getting wise enough; they are starting to realise the nuance of this matter: how risky it can be to hold major funds on CEX platforms. But some people are still holding their funds on CEX platforms even after these incidents. What do you want to say about this?

The another fact major people still stick to using these CEX platforms is also due to P2P feature. I don't know if there is any DEX P2P platform available in the market which is also trustworthy.

I think we should be extremely careful from now on, because with the amount of money the world's best exchange like Binance lost in a short-term attack, there is no guarantee that our hard-earned Bitcoins will not end up in the hands of hackers in an instant. Even though exchange wallets have some advantages, I think we should think long-term and prioritize the security of our investments.

I don't know why..... 

Let me tell you something more..... Today people are just too lazy