Theres a little panic selling thats happened this week thats why bitcoin price go down. But its not enough to make bitcoin price to go down deep. A normal strategy to make profit in a short period of time.
We should not get panic and at that stage we should try to buy as many coins as possible by taking an advantage of price dip so that it can give us an opportunity to accumulate more number of coins at lower price and sell them when price goes higher in future.