Many people think that bitcoin should move up in a straight line but this is not how the market works. Markets may show us many up and down before moving up and sadly people are not ready for these movements and sell their bitcoin before it reaches the all time high.
Cryptocurrency market sphere and especially bitcoin market speculation is not something we can rely on or trust to infinity, it's very obvious that the price of Bitcoin is not constant or stagnant, it has rotational speculation we know, while people adventure into the disadvantages of it, is when they purchase without reading the chart of cryptocurrency and comprehend it wisely, so that's the factor that leads whenever the price accelerates and some investors will be inquisitive to sell, and this also affects investor's that purchase when the price is high.