There are indeed many large financial institutions entering the cryptocurrency field, such as Fidelity’s new cryptocurrency service unit, Bain Capital invested in an exchange, Coinbase’s completion of Series E financing, and licensing supervisiWhen did Bitcoin starton in some countries have encouraged traditional Participation of the financial industry.

However, the circulation of virtual currency has a thorny double payment problem, also known as the "doublespending" problem. In order to prevent virtual currency holders from making multiple payments with the same currency value, any virtual currency system needs to spend a cost to track and mark the currency value held by each user. Obviously, there is a certain inherent contradiction between the requirements for tracking costs and close to zero-cost transactions. In addition to the technical level, virtual currency also has a design challenge. Almost all early e-commerce entrepreneurs advocated Hayek-style liberalism. They believed that the issuance of virtual currency should not be controlled by any organization or individual, including the government, but should be as scarce as gold, requiring a certain cost. Only then can it be produced, so that the problem of excessive devaluation can be fundamentally eliminated. This cost requirement coincides with the cost requirement of the tracking and marking function mentioned earlier. Therefore, admirers of virtual currency have been looking forward to a technology that can track and mark the use of virtual currency at a certain cost in a decentralized manner, which not only solves the double spending problem, but also provides the requirement for scarcity.

For many so-called developed countries, Bitcoin is a tool of speculators at best, and a tool of crime at worst. As the well-respected Bitcoin evangelist Andreas Antonopoulos said, one of Bitcoin's most revolutionary use cases will not happen in the United States, the United Kingdom, or Australia.

Earlier, Christine Lagarde, president of the International Monetary Fund (IMF), called on central banks to consider issuing CBDCs. Lagarde believes that such CBDCs should achieve three public policy goals:

Soon after, in September 2019, MarcelBurger copied Emblow's discovery. Later that month, Manuel Andersch, a senior German analyst at the Bavarian State Bank (BayernLB), did the same. After these confirmations, the S2F model was widely considered to be statistically valid and became more popular.

PoWhen did Bitcoin startloniex launched a pre-fork transaction at around 1 am UTC today to maintain a neutral position in the upcoming Bitcoin Cash upgrade. The theory that the market can help users reach consensus on the technology roadmap has been put forward before. This is the latest version of the exchange seeking to play a role in supporting community decision-making.