The only change in fundamentals is the belief that it will rise parabolically to Infinity.
Once in a while, with no change to the fundamentals of the investment thesis in Bitcoin, the price goes down. This can be after weeks and months of positive developments and investment from retail investors as well as funds and entrepreneurs in building new products that support and develop the ecosystem. This can represent the return to normalcy of expectations of the pace of progress into the future. It happens one day at a time.