Exchange or wallet?

this is the normal question about some people confused to keep their token,
in my opinion i think we gonna save to keep our token in wallet, why?
becuase in wallet we have some private key and just only one person know it's you.
if you keep your token in exchanger it's no safe , most of people lost their token, because their computer has attacking from virus, this is the high risk to save your token in exchanger.