suggests that the economic benefits of issuing a digital currency on a distributed ledger could add as much as 3 percent to a country's economic output. The Bank said that it wanted the next version of the bank’s basic software infrastructure to be compatible with distributed ledgers. Adoption by financial actors Government attitude dictates the tendency among established heavy financial actors that both are risk-averse and conservative. None of these offered services around cryptocurrencies and much of the criticism came from them. "The first mover among these has been Fidelity Investments, Boston based Fidelity Digital Assets LLC will provide enterprise-grade custody solutions, a cryptocurrency trading execution platform and institutional advising services 24 hours a day, seven days a week designed to align with blockchain's always-on trading cycle". It will work with Bitcoin and Ethereum with general availability scheduled for 2019. Hard vs. soft digital currencies Hard electronic currency does not have the ability to be disputed or reversed when used. It is nearly impossible to reverse a transaction, justified or not. It is very similar to cash. Soft electronic currencies are the opposite of hard electronic currencies. Payments can be reversed. Usually, when a payment is reversed there is a "clearing time." A hard currency can be "softened" with a third-party service. Criticism Many existing digital currencies have not yet seen widespread usage, and may not be easily used or exchanged. Banks generally do not accept or offer services for them. There are concerns that cryptocurrencies are extremely risky due to their very high volatility and potential for pump and dump schemes. Regulators in several countries have warned against their use and some have taken concrete regulatory measures to dissuade users. The non-cryptocurrencies are all centralized. As such, they may be shut down or seized by a government at any time. The more anonymous a currency is, the more attractive it is to criminals, regardless of the intentions of its creators. Bitcoin has also been criticised for its energy inefficient SHA-256-based proof of work. According to Barry Eichengreen, an economist known for his work on monetary and financial economics, "cryptocurrencies like Bitcoin are too volatile to possess the essential attributes of money. Stablecoins have fragile currency pegs that diminish their utility in transactions. And central bank digital currencies are a solution in search of a problem." Popularity Digital Currencies have become popular due to their convenient nature. Many users believe