Your account at exchange is a far more easy target for hackers than a coldstorage-wallet at your own house. Exchanges are attacked all the time. They are the primary target of hackers. To steal a password from your browser is much more easy than stealing coins from an offline-storage at your own home. Never leave more coins at exchange than what you are trading at that day.
For people who feel they don't know enough about how to keep their coins safe at their local computer here is a short tutorial how to do that:
https://bitcointalk.org/index.php?topic=527500.msg8178658#msg8178658friendly sponsored by Unobtanium-community
Keep your coins safe. Withdraw them to your desktopwallet. Don't be lazy. Better be safe than sorry.
Currently there are far too many coins at different exchanges. This applies not only to Reddcoin, Unobtanium and Vericoin - too many coins of all sorts at the exchanges! Withdraw whenever possible.
