we should know that bitcoin is going up not down, because what they expected in price of bitcoin when it was established is not something they are observing now, because far back 2009 bitcoin was introduced they don't have that mindset that bitcoin price will continue to increase,but right away government can not stop the existence of bitcoin but they can stop existence of exchange because is done in a centralized way, so I believe that exchange is effected bitcoin can not be affected because bitcoin itself is a decentralized currency