It depends on your target in buying bitcoin, what I really want you to understand concerning bitcoin is that the price interchanges and since it happens that way the only thing I needed in bitcoin price is that you have to as well try to know exactly when you wants to buy bitcoin so that you will make your profit, buying bitcoin when the price is low is the most time someone can make profit during bitcoin investment despite that their is no time someone buy bitcoin that is against, so another thing is that Bitcoin is something we all know that we can buy today reaching tomorrow the price can as well fall or increase to any point, so therefore buying bitcoin for long periods of time I will advice to buy when the market is low in price and sell with target and mostly when the profits is above what you purchased.