Think you'll find that any user here would advise you against storing on exchanges. There's just been too many instances of exchanges holding coins against the will of depositors. Could be any reason, any excuse, and you'll be completely powerless. Even the reputations and influence of big crypto names didn't help in the cases of Mt Gox, and more recently Coinbase. They levelled threats of legal action, even personal injury, and still couldn't get their coins back.
One year with no intention to trade? It takes you a few minutes at most to withdraw and store them securely in your own wallet.
So if you're going for an exchange, try and find one that's insured in your country, or try and find out about cold storage.
That's why I'm really interested in the Japanese exchanges that were shut down. They were forced to take mandatory insurance for deposits before they got their licences... I don't know any other case where insurance has been successfully paid out for exchange losses.