The real reason of falling down the market is because of the demand. As the demand increases the , the supply also increases then the market rise and vice versa. The main reason of falling down the market is based on the demand and supply. Some of the investors heard from the news that this is not the right time to invest and  they  wait until  the  price get  high. Also, some of  the  government banned bitcoin why  other  investors are afraid to invest because they won't loose their money.