why ppl selling Bitcoin at this point ?

It is pretty guaranteed that Bitcoin will go up in the coming weeks. it's like if you invest in a GIC the only risk you have is if Bitcoin fail. 

if you are a day trader or you have an emergency, fine but if not, You are dumb to sell your Bitcoin. For Real.

You have a once every 4 years opportunity that you know for sure that an investment will go up and you decide to sell before.