It is after attack but in the case of BitGrail, ordinary account holders are set to suffer. A while back, this Italian exchange was hit by hackers who made away with $187 million worth of Nano coin. Even though the operations of the exchange took a hit, they resumed normal services a few days later. However, with formal announcement by the exchange that they were not in a position to reimburse user funds because they strongly believe hackers took advantage of Nano’s blockchain weakness, the Nano Foundation refutes these claims.[IMAGE: https://cdn.steemitimages.com/DQmaxayLiv2mCKX5yA9SdyXsKdrv2qCR5gXcCzJqheS22gv/image.png]