Bitcoins is a very fluctuates. Bitcoin is limited but there are demand is huge. Demand and supply teaches us that if demand goes up and supply stays the same, prices will definitely go up
If demand goes down and supply stays the same, prices will definitely go down. Simply put; Bitcoin will continuously go through these phases of high demand and low demand which will lead to the increase or decrease of its price. Its same for Gold and the stock market. Its not going to change.
What should change however is your education or current understanding of how this works
to read the charts and understand when its a good time to buy and when its a good time to sell. The fluctuation in price will not stop.