Recently, I’ve been organizing some ideas about digital currencies and realized that this topic truly deserves a deeper discussion.

Many people’s understanding of digital currencies still stays at the surface level, but their core logic is actually quite clear. Simply put, digital currencies are built on a network of nodes and cryptographic algorithms, with the biggest feature being the absence of a central issuing authority. This fundamentally changes the rules of traditional currency games. Because the algorithm itself determines the total supply cap, inflation caused by excessive issuance is essentially impossible, and transaction processes require network node approval, ensuring security.

The emergence of Bitcoin indeed had a huge impact on the existing monetary system. Although it falls under the category of virtual currencies, its nature is completely different from points issued by online companies, which is why it is specifically defined as a digital currency.

Speaking of advantages, the most straightforward are three points. Transaction costs are almost negligible, unlike traditional bank transfers that charge high fees, especially advantageous for cross-border payments. Speed is also much faster because blockchain is decentralized, eliminating the need for clearing centers, enabling direct peer-to-peer transactions. And then there’s anonymity—transactions can be completed even when both parties are strangers, with good privacy protection. But honestly, this also makes it easier for some illegal activities.

However, digital currencies are like a double-edged sword. On one hand, the underlying blockchain technology achieves true decentralization, and its application scenarios go far beyond just currency, which is why Bitcoin has attracted so much attention. On the other hand, if digital currencies truly replace fiat currencies on a large scale, the impact on the entire financial system could be significant.

From a monetary policy perspective, digital currency issuers are usually unregulated, and the issuance volume is entirely at the discretion of the issuer. This can lead to unstable money supply, and central banks have no precise way to monitor circulation, which undermines policy formulation and transmission effectiveness. Financial infrastructure will also be impacted; distributed ledger technology changes traditional settlement methods, posing challenges for payments, clearing, and settlement.

The intermediary role of banks is also under threat. Banks are essentially financial intermediaries responsible for supervision and capital flow, but if digital currencies and distributed technologies become widespread, this system could be dismantled. Additionally, security risks cannot be ignored—cyberattacks could trigger currency fluctuations, affecting the entire financial order and the real economy.

In terms of applications, digital currencies have the greatest potential in cross-border payments. In 2018, the total cross-border payment settlement volume was about 8 trillion RMB. Using blockchain technology, the cost of each transaction could be reduced from $26 to $15, saving about 40%. In the future, utilizing digital currencies for peer-to-peer payments, eliminating intermediaries, with real-time transfers within 24 hours, will be especially beneficial for cross-border e-commerce.

Currently, banks still have a lot of manual work in mortgage processes. Many collateral assets are mispriced or involve multiple pledges. Using digital currencies combined with smart contracts can automatically eliminate issues like multiple pledges, automating the entire process and significantly reducing bank costs.

Bills and supply chain finance are also major directions. Domestic bill transactions still rely heavily on paper, with about 70% of the business being paper-based. Supply chain finance also depends heavily on manual operations. Digitizing bills and conducting transactions via blockchain makes all information transparent, and electronic contracts generated by smart contracts are tamper-proof. They enable direct peer-to-peer value transfer and prevent double selling, allowing real-time tracking of fund flows. Shenzhen has already developed an electronic bill system and is promoting it, marking another successful application of blockchain technology.

Based on their relationship with the real economy, digital currencies can be divided into three categories. Fully closed ones, only usable within specific communities, like gaming coins. Those that can be purchased with real currency but cannot be exchanged back, like certain social platform virtual currencies. And those that are freely exchangeable, capable of buying virtual goods as well as real-world products—Bitcoin belongs to this category.

Currently, digital currencies are more like investment products rather than actual payment tools because they lack a strong price stabilization mechanism. Trading platforms act as agents or market makers, earning profits from transaction fees and spreads. The entire ecosystem relies on interactions among trading platforms, operators, and investors.

In summary, the development prospects of digital currencies are indeed worth paying attention to, but it’s also important to recognize the risks and challenges involved. For those who want to participate long-term in this field, understanding these fundamental logics is still very necessary.