From the beginning, when I became acquainted with the world of bitcoins and altcoins, I heard the news of hacking users' assets in various exchanges several times. On the other hand, because transactions are anonymous in most cryptos blockchains, it is difficult and often impossible to track stolen assets from users.
For this reason, in my opinion, the most important factor in choosing an exchange as a broker for transactions is the security of that exchange.
Kucoin exchange has the possibility of two-step login with google authenticator. It is also possible to link a person's mobile phone, which is why access to the account is only possible by accessing the SIM card of the account holder.
Therefore, even if a person has our account password, he can only withdraw assets if he has access to several other tools.
Another advantage of kucoin is the high speed of the exchange server and the absence of annoying downs at important times.
kucoin supports a large number of altcoin, so spot trades are also possible for high level users.