I dont know why i should not keep my coins in exchanger if i am carefully then i think that nobody cant stole my money from my wallet so i keep my money in exchanger really long time and it is still there in exchanger.
well i guess you didnt learn about the bitfinex hack, it should be never done because no one knows what might happen
That's why i never keep my bitcoins on exchanger, it's really risky because they can take your coins or a hacker hack that exchanger sites like happened to bitfinex.