The fluctuation of bitcoin is what people regard as the beauty of it. It may not stop but reduce for a certain moment and continue. At the time it reduce, the buyers will come in and it will start fluctuation or volatile.
As in the quote, fluctuation I is the best feature that one can experience with bitcoin. People fear about the market fluctuation while the wise one makes an earning out of the same. None can calibrate the end of price fluctuation, as well can't eliminate the feature out from bitcoin. This is well connected with bitcoin to make a big change in the global economic market.
i strongly agree with your opinion that fluctuations is here to stay as people or trader mostly who look at this situation as a way to make money , as an opportunity that you will never find it anywhere else , it is the one and only market.
if you want a stable market with low movement frequency then stock market and any other financial market except crypto is your place.
indeed we have a stable coin , a -claimed- cryptocurrency with less fluctuation even tend to stable.
but are you sure you can trust on something dreamy like those stable coins? stable coins is the biggest scam that so far run so clever behind cryptocurrency.