It depends on the rules of the exchange.
In general, it's not a good idea to keep your crypto in an exchange for a lot of time, crypto word is pretty and many things can happen in a short time (exchange can disappear or fail, or introduce suprise-KYC etc...). Exchange are good for...exhange assets, not to store them.
Also, on a "big scale" it's not good for the crypto-world to store money on exchanges, you can find a deeper analysis here: https://bitcointalk.org/index.php?topic=945881.0