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.
Through crypto ETFs, investors can speculate on the future cost of cryptocurrencies without having to actually hold it themselves.

It’s not a very difficult task to invest in cryptocurrency, thanks to the easy access available to crypto exchanges and deep penetration of the internet and smartphones. Technology has eased the access to digital currencies for potential investors. To invest in cryptocurrencies, investors need to first do some homework for choosing the right cryptocurrency and crypto exchange. One can buy these currencies using their home currencies, or US dollars, from his/her preferred exchange. However, there are some currencies that accept investment only in Bitcoins or other cryptocurrencies.
Cryptocurrency can be mined by people by using computers. By mining cryptocurrency, people are rewarded small amounts of Bitcoin or another crypto for doing so.