We don't know what their decision is, but if you ask me, I will still stay at binance as a trader and investor.
I don't think that binance will stay without fixing the problem they are facing before.
But I don't just choose binance for trading or investing because I have the other exchange to trade and invest.
So binance is not my only option to search the profit from crypto.
But I guess the traders and the investors will stay at binance as me because they think that binance can solve every problem they have including the hacking news before.

It all depends on each investor, obviously I really do not know with their thoughts, Binance set aside funds called SAFU accounts, so that the losses will be fully borne at no cost to the user. The security review process, which is estimated to take around one week, will be carried out to prevent further attacks on the Binance exchange.

I guess most of them will stay on binance. cause i'm sure they have learned and will focus on more security. a big plus for binance is also the announcement that all of the stolen funds will be covered by the safu fund. binance is still way more professional than any other exchange.

every time there is hack like this there is always a large number of users who leave that hacked exchange. you can clearly see this from all the previous hack cases when the exchange comes back but no longer has the same volume. that is normal human behavior to stay away in safety after a disaster like this.
but it is never all the users and the magnitude of the "migration" depends on many factors such as shadiness of the exchange, whether or not they are paying out their users, and a lot more. but basically it depends on how much people still trust that exchange, in case of Binance i don't think trust was lost that much but it was lost.

We can not be so sure about it after all this is their decision to make and Binance can not control people that are leaving and staying in their exchange site, Although Binance CEO announce that they have revamped the security of their exchange site, that it will never happen again, And this progress will sure keep phishing, hackers, and viruses away from their site, but I guess the price of Bitcoin wasn't really affected by this incident, And if the number of traders and investor would go out from their site they can not do something about it.

for me, i would still be trading at binance because they had a high trading volume, which for me is good for trading and getting profit

In any case, some of the investors and traders will leave this exchange, but I think the majority will remain. And in general there is a rumor that all this was arranged by the exchange itself.

Anyway, I'm staying there.

There will be few that will choose to stay away from it because if something already happened like this, it's likely to happen in the future. But there will be more of those loyal traders and will stay.

Yes, I think it'll be Kucoin?

No exchange gives with the support of providing the users the funds, if it has got stolen. This way no one will move towards the other exchange from my view. Further the exchange trading volume for each and every asset is kept stable with the reserve fund and users were given with the regular update. The latest being the trading and withdrawal suspended for a week.

Probably store most of their coin into hardware wallet but that those that mean they abandoned binance