I think bitcoin price is difficult to predict accurately. We can only judge according to market changes and some external news, but I will still buy it because I believe it will appreciate again. It will reach a height we can't think of.
But if you take into account not only Bitcoin, but also other coins on the exchange, you need to analyze the graph of the fall and growth of this coin. Thus, you can determine the average and maximum value of the price for a particular coin.