The essential attribute of currency is the Unit of Account, its core function is as a medium of exchange (payment tool), and its fundamental expression is the most powerful Liquidity (which requires the highest authority or highest credit backing or protection) of value tokens (transferable and circulating value rights). These are the three indispensable elements for understanding currency, which will never change (if they change, it won't be currency). However, the carrier or manifestation of currency (such as shells, minted coins, paper money, deposits, electronic Wallets, Digital Money, etc.) and its operating methods need continuous improvement to enhance efficiency, drop costs, and strengthen risk control, thus better fulfilling the functional role of currency in promoting exchange transactions and economic social development. Therefore, it is essential to have an accurate grasp of the essence of currency and its operating methods. First, as a Unit of Account, the most fundamental requirement for currency is to maintain the basic stability of its value. This requires that the total amount of currency must change in accordance with the changes in the total value of tradable wealth expressed and settled in currency, maintaining a basic stability in the overall correspondence between the total amount of currency and the total value. From a societal perspective, the total amount of currency and the total value of tradable wealth overlap, where the wealth value is real and fundamental, while currency is merely a representation (measuring unit) of that wealth value, representing the right to claim wealth value; currency is not wealth itself. Therefore, the economic form represented by the generation and operation of wealth is referred to as the "real economy," while the economic form represented by the investment and operation of currency (including derived financial activities) is referred to as the "virtual economy." Without the support of real wealth value, currency becomes worthless. Of course, for individuals in society, currency represents the right to claim value, which indeed belongs to their assets. The dual nature of currency as "overall virtual but individual real" can indeed confuse people's understanding of currency, necessitating careful argumentation for accurate comprehension. To maintain the basic stability of currency value, all physical assets (such as gold with finite reserves) or virtual assets (such as Bitcoin, whose total and periodically added amounts are completely locked and unadjustable by the system) that serve as currency will all be...