| As the paradigm of the digital economy changes rapidly, blockchain and the token economy are establishing themselves as the core technologies fundamentally restructuring existing financial systems and economic structures. The emergence of Bitcoin became the opportunity to introduce the innovative technology of blockchain to the world, and subsequently blockchain has expanded into various fields including finance, supply chains, administration, and AI data management. Also, as the concept of tokens — comparable to traditional currency systems — has emerged, various forms of digital assets such as stablecoins, security tokens, and asset tokens have appeared. In particular, as AI technology and blockchain-based token economies converge, a new economic model called the 'AI Token Economy' is being formed. This chapter aims to explore in depth the changes in the digital economy, from the basic concepts of Bitcoin and blockchain to the evolution of blockchain, the differences between tokens and currency, and the future that the convergence of AI and blockchain will bring. |
1. Bitcoin and Blockchain
Bitcoin is the world's first decentralized digital currency and an electronic payment system based on cryptographic technology. Direct transactions are possible in a P2P (peer-to-peer) manner without the intervention of central banks or financial institutions, and functions such as remittance, lending, and payment can be performed. However, the more important significance lies in that Bitcoin is evaluated not simply as a virtual currency but as a technological innovation forming the foundation of a decentralized financial system utilizing blockchain. Antonopoulos (2014) defined Bitcoin as "a collection of concepts and technologies," and cited four core components: a decentralized P2P network, a public transaction ledger (blockchain), a distributed mining system, and a transaction verification system.
How Bitcoin Works and the Mining System
Bitcoin was first conceptualized by Satoshi Nakamoto in 2008, and the network began operating in earnest when it was released as open-source software in 2009. Bitcoin adopted a Proof-of-Work (PoW) algorithm based on blockchain technology to resolve the double-spending problem of digital currencies. Through PoW, all transaction records are recorded on the blockchain, and network participants verify these in a distributed manner.
The Bitcoin network operates through the processes of transaction transmission, verification, mining, and block creation. When a user transmits Bitcoin, this transaction is propagated to nodes in the network, and miners begin competing to include it in a new block. In the mining process, complex mathematical operations using the cryptographic hash function (SHA-256) are performed, and miners who solve these are rewarded with new Bitcoin and transaction fees.
The security of the Bitcoin network is maintained by the force of the PoW algorithm and the distributed network. Miners create a new block on average every 10 minutes, verifying and recording transactions included in the previous block. Bitcoin's blockchain is immutable, and for existing transaction records to be manipulated, more than 51% of the network's computational power would need to be seized, which is realistically nearly impossible. Thanks to these characteristics, Bitcoin was able to establish itself as a trustworthy decentralized financial system.
Bitcoin and Bitcoin Cash: Scalability and the Split of Miners
From 2017, the Bitcoin network began experiencing "scalability issues." The existing Bitcoin block size was limited to 1MB and could process a maximum of 250,000 transactions per day. However, as Bitcoin's popularity surged and transaction volume increased, problems arose of slower transaction speeds and rising fees.
In the process of resolving this problem, conflict between Bitcoin developers and major Chinese miners surfaced, and ultimately on August 1, 2017, some miners split off from the existing Bitcoin protocol (forked) to create "Bitcoin Cash (BCH)." Bitcoin Cash was designed to expand block size from the existing 1MB to 8MB to process more transactions more quickly.
The split between Bitcoin and Bitcoin Cash is evaluated as a representative case where the governance of the Bitcoin network and conflicting economic interests clashed, beyond simple technical differences. The group seeking to maintain existing Bitcoin emphasized decentralization and security as the top priority, while the group supporting Bitcoin Cash prioritized fast transaction processing speed and low fees. Thus, Bitcoin can be said to be not a single system but a digital economic system that continuously evolves according to the interests of network participants.
The Economics of Bitcoin and the Issuance Model
Bitcoin has a currency issuance policy based on a precise mathematical model. Bitcoin blocks are created on average every 10 minutes, and each time a new block is added, a certain amount of Bitcoin is paid to miners as a reward.
Bitcoin's total supply is limited to 21 million BTC, and it follows a halving model where mining rewards are halved at fixed intervals. During the first four years, each block contained 50 BTC, but this decreased to 25 BTC in November 2012, 12.5 BTC in 2016, and 6.25 BTC in 2020. In this way, mining rewards will continue to decrease until 2140, after which it is expected that the network will operate only on transaction fees.
This Bitcoin issuance method is fundamentally differentiated from traditional fiat currencies. While existing currency can have its issuance volume adjusted by central banks according to economic conditions, Bitcoin's supply is controlled according to a predetermined algorithm. Therefore, Bitcoin is not affected by inflation, and is rather evaluated as a deflationary asset where supply decreases and scarcity increases over time.
In particular, the limited issuance of Bitcoin becomes a factor that reinforces its role as a safe haven when economic crises or global uncertainty grows. In recent years, demand for Bitcoin has surged due to global financial crises, currency devaluation, and cybercrime, and movements to regard Bitcoin as an "alternative asset or digital gold" are spreading in many countries.
2. The Evolution of Blockchain
Since its emergence, blockchain has established itself at the center of financial and technological innovation, and is now entering a full-scale adoption stage, receiving active attention from major industries and governments. According to Gartner's technology lifecycle hypothesis, the "Hype Cycle," blockchain passed through the "Trough of Disillusionment" in 2021 and is entering the "Plateau of Productivity" in 2025, being deeply integrated into actual industries and economic systems.
The Entry of Cryptocurrencies into the Mainstream and Blockchain Scalability
Along with the entry of Bitcoin and other major cryptocurrencies into the mainstream, blockchain is developing in a direction of creating real value in various industries such as finance, public services, supply chain management, identity authentication, and smart contracts, going beyond being a simple technical concept. In particular, the legal status of cryptocurrencies in the global financial system is being strengthened, and as companies and institutions build business models based on blockchain, implementation and adoption are accelerating beyond the stage of technical experimentation.
In particular, as the Trump administration's pro-cryptocurrency policies become concrete, further integration of major coins into existing financial systems is expected going forward. For example, U.S. President Donald Trump announced plans to form a strategic cryptocurrency reserve including Bitcoin, Ethereum, XRP, and Solana upon taking office, expressing the position of making the United States a center of the global cryptocurrency market. These policy changes appear to be an opportunity to establish cryptocurrency not as a simple speculative asset but as an essential element of the national economy and financial system. European and Asian countries are also preparing legal and institutional frameworks for blockchain technology and cryptocurrency in response, and financial institutions are also hurrying to prepare to operate various blockchain-based assets including cryptocurrencies in earnest.
Blockchain Scalability and Industrial Application
The biggest characteristic of blockchain is that it can play an innovative role in various industries beyond simple cryptocurrency. In particular, blockchain 2.0 technology based on "smart contracts" is promoting the digital transformation of existing industries such as real estate, insurance, legal contracts, and supply chain management, and companies are realizing effects such as cost reduction, efficiency improvement, and increased transparency through this. And the blockchain 3.0 era refers to the stage where blockchain expands beyond finance into social and public domains such as government, healthcare, science, culture, and art. The core value of blockchain is "trust," which becomes a tool capable of securing transparency not only in simple financial transactions but in all areas including government administrative systems, medical data management, academic research, and content copyright protection.
In particular, the combination of AI and blockchain is emerging as a core element leading the next generation of technological innovation. By managing the large amounts of data generated by AI reliably through blockchain, the falsification and forgery of data is prevented and more efficient AI model training becomes possible. New service models combining blockchain and AI are appearing in various fields such as AI-based financial algorithm trading, healthcare data analysis, and public service optimization.
The Future of Blockchain and Changes in the Global Financial System
Even with the introduction of Central Bank Digital Currency (CBDC) by major countries, blockchain is serving the role of a connecting link between existing fiat currencies and digital assets. CBDC is digital currency directly issued by central banks, and is evolving in a way that promotes financial innovation and efficiency while coexisting with existing currency systems without undermining monetary and financial stability, while simultaneously strengthening transparency and security.
Also, as the global regulatory environment is being reorganized, the proportion of institutional investors' investments in blockchain-based financial products (ETFs, bonds, real estate tokenization, etc.) is rapidly increasing. This can be seen as a process of blockchain merging with existing financial systems and further strengthening its connectivity with the real economy.
Ultimately, the future of blockchain is deeply related to the new paradigm where cryptocurrencies and existing financial systems coexist. As blockchain technology continues to be applied in various industries including finance, data, administration, and AI, blockchain will establish itself as the core infrastructure technology that will innovate the global economic and industrial structure going forward. Blockchain has now moved beyond a simple technical experimentation stage, establishing itself as an essential element leading global financial and economic innovation, and the time has come for companies and governments to strengthen their strategic responses accordingly.
