I think the price drops in the cause by many who sell bitcoin simultaneously, it causes the demand to decrease and the price goes up. so when the price goes down try to stay calm and do not panic about it.
Many people make a wrong decision when panic selling happen, it is normal. Humans are love money, they will be afraid if their amount of money decrease. When panic selling happen on bitcoin it is the right time to buy.
I see many people gets panic when the price fall down they lose there interest and become emotional after that they do fast selling.Which isn't good. Bitcoin never works with your emotional. Some times need for it