Listen to the "hero" and "legend" staff comments. I am a "newbie" on here, but do know enough and have the experience to comment on this. A "-16%" (now -"14%", at time of writing) drop is laughable and a giant "FOR SALE" sign. Personally, I have been waiting for a drop like this for a minute to get more BTC.
You cannot stop it. BTC is here to stay.
Anything, under 3900 is happily bought. under 3500, buy. IF it hits 3000, I'd buy there but watch closely. Keep in mind that while this red downward drop is going on, right below it is the "volume" where BTC is being bought like freaking Oxycontin in 2002.
BUY & HOLD. Anything under $4000 is great.