Everyone saw this yesterday night. Market took a fall and almost all the coins had similar fall. Why? There must be a logic about this, One, something serious happened or is about to happen which changed the market or investors mood suddenly. I believe the crypto market is Not candid and low level investors get Panic whenever there is a fall. Two, there is a tendency where market after every now and then plunges to bottom, the fearful investors sell their currencies in loss and others make profit.
How we should behave? I have seen every coin rising after a fall. So sit tight, don't panic and wait. The price will go up.
And if you have some assets, buy coins when these hit rock bottom.