Why bitcoin start going down and down will it goes below 10000$?
The basic reason of the price going down is because of the people who are selling or taking their profit ,
The bitcoin price depends on its demand so as the demand decrease the price would fall down but I think nobody knows if it could goes below $10,000.
As more people started selling, prices began to drop, then more people began to panic, creating a stampede that led to prices eventually collapsing. More people selling their bitcoins for cash for this holiday season that's why it suffer from price drop. In this time lets just hold and be patient because at the end bitcoin will recover and surge again.