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??
Private Keys are very important in a digital coin wallet, you need it when you will be sending your digital coins, store it on your computer and stuff. It is safe because most wallets let you download your private key and they will know what are your private keys, because if they got your private keys, they will have an access to your wallet, and I think wallets do not just go out of business just like that, unless it is a scam.