Blockchain technology (or distributed ledger technology) was created by unknown persons under the pseudonym of Satoshi Nakamoto in 2008. The new technology promotes a decentralised approach for doing business as well as solving other real-world problems as it allows everyone in its network to store and validate transactions without the need for a traditional centralised organisation. Since then blockchain has attracted lots of public attention from different points of view/contexts. Built on blockchain technology, cryptocurrencies and a wide range of tokens are created with different purposes to contribute to the decentralised economy. Some prominent examples include Bitcoin as a decentralised currency or Ethereum as smart contract platforms. These platforms have various real-world applications such as digital currency, origin/lifetime tracing in supply chain management, or securities trading. Given such potentially massive economic contribution, not many people fully understand the fundamentals of blockchain/cryptocurrencies, how to apply standard mainstream finance theory to cryptocurrencies, tokens, and other crypto assets, as well as evaluate them from financial, taxation, and regulatory perspectives. Explain the role of banks and their potential problems as a centralised organisation in an economy. Evaluate the future decentralised system (with blockchain technology) versus the traditional banking system (for example: how can decentralised system solve banks' problems....). Illustrate your answers with 2 specific examples. Your applications/examples must be in the context of finance/financial systems.