Here is the reason it is temp shutdown. It wasnt even a hack. It was an exploit that some people started taking advantage of.

They have to manually go through all accounts and investigate who was using the exploit to double up their coins. Bad news for you if you were one of the ones that did this exploit. You will lose all your investments.

Good news is that is not as bad as we all think and will get sorted.

https://youtu.be/YYxbCHIWOgY