The theory that is circulating on telegram is that something big is about to happen where people would want to withdraw BTC quickly and in large volumes. Then the above exchange would have blocked withdrawals for 7 days while they "fix" this robbery issue.
This twitter account you cited above has gotten some stuff right but has also published a lot of FUD that didn't confirm itself.
So best thing to do is gather several opinions and arrive at your own conclusions about this. I don't think the next week chaos scenario will happen. I think Binance was really hacked this time.