Just hold long term, dont listen to fud posts and you'll be okay.
Don't panic, don't look at charts when its red days but now bitcoin is up again. So I'll reverse the question, why bitcoin is up again?Correction is a normal and fairly regular process. Also very affected by this news and events of the East, including Chinese new year 
Chinese new year gave bitcoin a big cut from its existing price that we are happy to see it staying at $15,000 - $19,000. But because many cashed out and sold their btc's it went down.