Bitcoin Gold hard fork is just around the corner, so it is important to know where to keep my Bitcoins in order to receive bitcoin gold. I know offline wallets are obviously a safer choice but will it be just fine if some bitcoin balance is on exchange websites?
It's never a good idea to store large amount of coins on exchange, but sometime you just can't avoid it. Leaving just a little amount of bitcoin on the exchange won't hurt, as long as you can afford the lost (if happens). Sooner or later exchanges will give you the forked coins, it's just the matter of time (XAPO has offered BCH in early October, the fork happened in August...)