Never store long term on an exchange.  Is it convenient? yes, especially with all the forks and whatnot.  But under no circumstances would I ever leave on an exchange.  Lots of new people here dont remember what it was like to lose money on Mt Gox, or even BTC-E, so I say it again, DO NOT STORE YOUR MONEY ON AN EXCHANGE.  Buy a hardware wallet, learn how to use it, and keep it in a safe place.  I suggest Ledgers Nano S, and right now they even have a deal for 21% off because of Black Friday.  Check it out.  https://www.ledgerwallet.com/products/ledger-nano-s