Bitcoin is and always will be very volatile, but this does not mean having to give up his purchase. If you look at the chart of growth rates you will see that every year the price of bitcoin is increasing. This trend will persist for a very long time so you can buy it at any time.
First we should always consider that bitcoin is a form of crypto-currency in which its price is dependent on the flow or on the changes in the stock of the market , where its price is dependent on the support of the people who uses bitcoin in transaction, investments. It is also a good thing because there is always a room for development and changes as people will support bitcoin in terms of transaction and investments.