If you wish to hold some coin then use exchange only for during exchange. Just exchange your coin and transfer on your personal wallet that you have controlled. Specially you can use hardware wallet.
Because many exchange hacked buy hacker. Many people loss their capital by hack.
So please don't hold your coin on exchange for long time.
It's not really a good idea to put all your coin in an exchange specially if you plan it to hold for long term but I think people still prefer putting it in exchange because its convenient when you badly need to sell your coin its a risk to take and I think people are already aware with the consequences.
Yeah that is right. Exchanges are mostly not helping you when it comes to long term holding. Better option is to make a good trade and hold them in your electronic wallet. Wait, did you just write the physical wallet here? No, dont be kidding me. How can you save bitcoin or any other coin in your physical wallet? Hahaha they are virtual currencies that cant just be seen in physical environment.