Wavelet coherence plots as above highlight areas in the time-frequency space where the two series co-move. The warmer the colour, the higher the coherence (which can be interpreted as correlation) at that location in the time-frequency space; the colours used in this work range from dark blue (0, no coherence) to yellow (1, strong coherence). Statistically significant areas of coherence are surrounded by a thick black line.
According to the BLS, rising energy costs fueled a rise in CPI, but for at least six months, analysts have tracked the rising costs of food and other goods. The current CPI is the highest it has been since October 1990. Core inflation, a figure that ignores the impact of the rising cost of goods, showed a 4.6% increase, a level not seen since 1991.

A cryptocurrency is, most simply, a digital asset. It is called a currency because it was created to work as a medium of exchange in the same way that we use fiat currencies now.
As far as payment for assets goes, platforms offer crypto purchases via bank transfers, crypto transfers, or credit cards, depending on the platform. Buying crypto with cash in a person-to-person fashion is also possible. Availability for buying and selling crypto on any given platform, however, can vary from region to region.