It can be seen from Fig 6 that coherence in the short run is erratic throughout the time interval analysed, and that there is little appreciable difference between the bubble and non-bubble regimes. However in the medium term (8–16 and 16–32 days), coherence generally peaks around areas where bubbles have been identified in the price series. The longer term relationship, though, is less dependent on whether the price is in a bubble phase.
One of the key principles of smart investing is: Never invest in anything you don't understand.

“If you were to wake one morning to find that crypto has been banned by the developed nations and it became worthless, would you be OK?” Frederick Stanield, a CFP with Lifewater Wealth Management in Atlanta, Georgia, told NextAdvisor recently.
Although mining periodically produces new cryptocurrency units, most cryptocurrencies are designed to have a finite supply — a key guarantor of value.