The rise during this period of time and the sudden drop yesterday are normal fluctuations, but the magnitude is a bit larger. Essentially, some big bookmakers harvest ignorant retail investors. Market sentiment and Bitcoin news are their tools. There are good reasons to complete the accumulation of wealth, and retail investors really don't have much say. This is how the two sides of the zero-sum game face off. Don't be surprised. In fact, this kind of volatility is something that many traders look forward to very much. If the Bitcoin price fluctuates very little, it will be a time torture for them.