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.
The CFPB names more specific risks that consumers should be prepared for, including volatile exchange rates, potential high fees on exchange platforms, and fraud risk. If your funds are lost or stolen, they can be especially difficult to recover, thanks to the decentralized nature of blockchain and lack of any governmental oversight.

A cryptocurrency transaction is usually a rapid and straightforward process. Bitcoin, for example, can be exchanged between digital wallets using only a smartphone or computer. Public and private keys and various incentive schemes such as proof-of-work and proof-of-stake are used to safeguard these transfers. Payments in cryptocurrencies are growing more popular among large corporations and in industries such as fashion and pharmaceuticals.
That lack of widespread adoption, plus crypto’s volatility, limits its use as a currency, says Roger Aliaga-Díaz, principal and senior economist with Vanguard Investment Strategy Group.