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.
Cryptocurrency — also known as crypto — is a digital currency designed to work as a medium of exchange. It uses cryptography to secure and verify transactions, as well as to control the creation of new units of a particular digital currency.

However, about 310 users suffered a more serious breach, including the release of their names, birthdays, and zip codes.
Many lesser-used cryptocurrencies can only be exchanged through private, peer-to-peer transfers, meaning they’re not very liquid and are hard to value relative to other currencies — both crypto- and fiat.