Safemoon crypto is not a coin, but a token. It has seen major price rises movements over just a few months in 2021. The price surged by tens of thousands of percent in April and May, then lost most of those gains by August. Such volatility is far from unusual in the crypto space.
In many ways, 2021 has been a “breakthrough,” says Dave Abner, head of global development at Gemini, a popular cryptocurrency exchange. “There’s tremendous focus and attention being paid to [the crypto industry].”

The horizontal axis shows the time; relationships positioned towards the leftmost area of a diagram occurred at the start of the data interval considered, and those at the rightmost end occurred at the end of the data interval considered. The vertical axis shows the period; lower period bands (higher frequencies) are shown near the top and higher bands (lower frequencies) are near the bottom. Lower bands would be of interest to investors with short term horizons, whereas higher bands would be of interest to investors with longer term horizons.
In order to provide a methodology to detect bubbles in time series, Phillips, Wu, and Yu [23] proposed the supremum augmented Dickey-Fuller (SADF) test. This applies a series of right-tailed unit root tests to expanding windows of a time series (with a fixed start date), defined by where r2 is the final data point to be considered in each window, starting at r0 which is a fraction representing the smallest allowed window size and expanding to 1(the complete data set).