Bithumb Hacked for $30,000,000

I just saw this post on Twitter from the Bithumb account:
[Notice for the suspension of all deposit and withdrawal service]
We checked that some of cryptocurrencies valued about $30,000,000 was stolen. Those stolen cryptocurrencies will be covered from Bithumb and all of assets are being transferring to cold wallet.

Please be aware it is dangerous to leave your coins on exchanges.

PS
I am not a financial advisor.