Again and again. The cryptocurrencies exchangers and operators list who gets hacked is growing day by day. Just some months ago was the moment of nicehash, that was robbered of a huge amount of bitcoins. Now italian cryptocurrencies exchange bitgrail has paid a great bill:

“… Internal checks revealed unauthorized transactions which led to a 17 million Nano shortfall, an amount forming part of the wallet managed by Bitgrail,” the site post stated. “Today a charge about those fraudulent activities has been submitted to the competent authorities and now is under police investigation.”

Please learn everybody and do not leave your coins on exchangers. They are very risky because you dont own the private keys of your digital assets. Keep them safe in a hardware wallet. It’s better to be serious and do not underestimate the risk of leaving money on exchangers. Please read this article on private wallet importance  for example

Below you can read about that