Blockchain Technology: A New Era of Rebuilding Financial Infrastructure

Blockchain Technology: A New Era of Rebuilding Financial Infrastructure A silent revolution is taking place in the global financial sector. Blockchain technology is expanding its influence across banking, investment, remittances, and even government services. Today's discussion focuses on how this technology works, what possibilities it creates, and where the challenges lie. Blockchain is essentially a decentralized digital ledger. Each transaction is stored in a 'block', and that block is cryptographically linked to the previous block. As a result, altering any transaction is nearly impossible. This characteristic is what makes blockchain so attractive in the financial sector. Recently, international financial institutions have been experimenting with blockchain-based settlement systems. Institutions like JPMorgan, Citibank, and HSBC have already begun using blockchain in their internal processes. The main goal of this change is to increase transaction speed, reduce costs, and ensure transparency. Blockchain technology can revolutionize cross-border payments in particular. Traditionally, an international transaction takes several days to complete, involving multiple banks and clearing houses in between. Blockchain can reduce this process to just a few seconds. The Monetary Authority of Singapore (MAS) and the Bank of Thailand are working together on a project called 'Project Inthanon', where they are testing blockchain-based cross-border payments. In this project, transaction time has dropped from several days to just a few minutes. Central Bank Digital Currencies (CBDCs) are the most discussed application of blockchain technology. China has already launched its digital yuan, which is used by over 100 million users in the country. The European Central Bank is also experimenting with a 'digital euro'. These digital currencies are built on blockchain technology, allowing users to transact directly with the central bank. The need for intermediary banks is significantly reduced here. In Bangladesh's context, the potential of blockchain technology is enormous. The country's remittance sector can be operated more quickly and at lower cost using blockchain. Currently, expatriate Bangladeshis bear an average cost of 5-10% when sending remittances. Blockchain-based platforms can reduce this cost to 1-2%. Bangladesh Bank is already considering a pilot project for a 'Bangladesh Digital Currency'. Experts believe that if this initiative is implemented, it will have a positive impact on the country's economy. Another important application of blockchain is supply chain management. Large companies like Walmart, IBM, and Maersk are using blockchain in their supply chains. Through this technology, every step from product manufacturing to consumer can be tracked. This makes it easier to prevent counterfeit products. In 2026, Walmart reportedly saved over $1 billion through its blockchain-based supply chain system. The healthcare sector is also increasingly adopting blockchain technology. If patients' medical records are stored on blockchain, their medical history will become more secure and easily accessible. Estonia is already using blockchain technology in its national healthcare system, where over 95% of medical records are digitized. However, there are some significant challenges on the path of blockchain technology. First, the scalability problem. The Bitcoin network can process only 7 transactions per second, while Visa processes 24,000 transactions per second. Second, energy consumption. Bitcoin mining consumes about 160 terawatt-hours of electricity annually, equivalent to the annual electricity consumption of a small country. Third, regulatory uncertainty. Different governments have adopted different policies regarding blockchain technology, making international cooperation difficult. Various technological innovations are underway to address the scalability problem. Layer-2 solutions like the Lightning Network are helping to increase Bitcoin's transaction speed. Ethereum's 'sharding' technology promises to multiply the network's transaction capacity. After Ethereum's 'Dencun' upgrade in 2026, the network's transaction fees dropped by 90%. These developments are making blockchain more practical. To reduce energy consumption, the 'Proof-of-Stake' (PoS) consensus mechanism is becoming popular. Ethereum transitioned from Proof-of-Work to Proof-of-Stake through 'The Merge' upgrade in 2026, resulting in a 99.95% reduction in network energy consumption. Networks like Cardano, Solana, and Polygon are also using this method. The biggest potential of blockchain technology is in digital identity systems. Currently, a person has to carry multiple documents to prove their identity. In a blockchain-based Digital Identity (DID) system, once a person registers their identity, it can be used across multiple services. Microsoft and IBM are already working on such systems. By 2026, it is predicted that 500 million people worldwide will use blockchain-based digital identities. Smart contracts are another important application of blockchain. Through this technology, transactions are automatically completed when contract conditions are met. In the real estate sector, smart contracts are making property transfer processes faster and more transparent. In 2026, a real estate transaction in Singapore was completed entirely through smart contracts, with property transfer completed within just 24 hours. The Decentralized Finance (DeFi) sector of blockchain technology is also growing rapidly. By the end of 2026, the Total Value Locked (TVL) in the DeFi sector exceeded $100 billion. Platforms like Uniswap, Aave, and Compound are offering users the opportunity to borrow, lend, and earn interest outside traditional banks. There are no intermediaries on these platforms, and all transactions are automatically completed through smart contracts. However, security risks in the DeFi sector are also significant. In 2026, a total of $2.5 billion was stolen through DeFi hacks. If there are bugs in smart contract code, hackers can exploit those vulnerabilities. Experts say that security audits should be mandatory for DeFi platforms. The future of blockchain technology is bright, but some obstacles need to be overcome on the path to implementation. The regulatory framework is still not clear. Different governments have adopted different policies regarding blockchain technology. In the United States, the Securities and Exchange Commission (SEC) has taken a tough stance on regulating cryptocurrencies, while the European Union's MiCA (Markets in Crypto-Assets) regulations are more liberal. This uncertainty is a barrier for international investors. Some steps are needed for the development of blockchain technology in Bangladesh. First, a clear regulatory framework should be formulated. Second, skilled human resources in blockchain technology should be developed. Third, pilot projects for using blockchain in government services should be launched. Fourth, collaboration with international blockchain platforms should be increased. The Bangladesh government has already taken some initiatives under the 'Digital Bangladesh' program. Bangabandhu Digital University and the ICT Division have launched training courses on blockchain technology. However, these initiatives are still in the early stages. Blockchain technology can also play an important role in increasing financial inclusion. 1.7 billion people in the world are still outside banking services. Blockchain-based digital wallets can provide financial services to this population. In Africa, mobile money systems like M-Pesa have already shown a path in this direction. Blockchain can accelerate this trend further. The biggest challenge of blockchain technology is public awareness. Many people do not understand how this technology works. As a result, they hesitate to use it. This awareness can be increased through education and training. Blockchain technology should be included in university curricula. Recent research shows that the global blockchain technology market will reach $94 billion by 2026. This market was only $3 billion in 2026. This rapid growth proves the technology's potential and acceptance. Blockchain technology is being used not only in the financial sector but also in voting systems, asset registration, education certificate verification, and intellectual property protection. In 2026, blockchain-based voting systems were tested in some US states, where voters could independently verify the validity of their votes. An important application of blockchain technology is tokenization. In this process, real-world assets such as real estate, artworks, and even cars are converted into digital tokens. These tokens can be traded on blockchain. As a result, small investors can also own a portion of large assets. In 2026, a famous art gallery in New York tokenized a painting from its collection, which was divided among 500 investors. The future potential of blockchain technology is limitless. However, successful implementation of this technology requires coordinated efforts from the government, private sector, and educational institutions. With the right regulatory framework, adequate infrastructure, and skilled human resources, blockchain technology can usher in a new era in the global economy. Bangladesh should not miss this opportunity. The country's young generation is extremely skilled in technology. By leveraging this skill, Bangladesh can become a regional hub for blockchain technology. This goal can be achieved through public-private partnerships. We need to change our perspective on blockchain technology. It is not just a technology; it is a new economic system. In this system, transparency, security, and efficiency are the three main pillars. Based on these pillars, blockchain technology can transform the global economy in the coming decade. We must prepare for this change now. Through education, research, and innovation, we need to harness the full potential of blockchain technology. Bangladesh has immense opportunities in this journey. It is time to turn those possibilities into reality.