People often say exchange are risky because one does not have access to his private keys and other secrets stuff.
My Question is why are this keys safe? What if the wallet I have my Bitcoin in dissappears or goes out of business what will I do with the keys??
I guessed the reason for saying that your private key is important is because with your keys you are really sure you are in control although nobody knows what will happen if bitcoin disappears in which ilthe likelihood of that is slim. You don't want to compare that with a situation where the exchange site might just wake up and park up which makes the money gone forever despite the fact that bitcoin is still available in other people wallets.