Bitcoin's Human Computer Interaction: Philosophical Mapping of Ownership and Digital Self The emergence of Bitcoin is not only a technological revolution, but also a profound social experiment. Its unique human-computer interaction mode, from a philosophical perspective, touches on the core of human self-awareness, ownership concepts, and relationship with the digital world. Drawing on the philosophical ideas of Spinoza, Fichte, Mach, and Avenarius, we can gain a deeper understanding of how Bitcoin achieves individual self expansion and mapping through key ownership and UTXO (Unspent Transaction Output) mechanisms. 1、 Spinoza's Perspective: Individual Style and Self Preservation Efforts Under Spinoza's ontological monism framework, human users and the Bitcoin system can be seen as different "styles" of the same broader socio-economic and technological "entity". The process of human-computer interaction is the manifestation of the interaction and influence between these two styles. The holding and use of Bitcoin by users, such as pursuing wealth growth and value storage, can be understood as an extension of their "self preservation efforts" (Conatus) in the digital economy. The operation of the Bitcoin system, such as maintaining ledger security and verifying transactions, can also be seen as an inherent effort to maintain its own existence. Furthermore, by holding the private key and controlling the corresponding UTXO, users have incorporated a portion of the digital value into their control. This part of digital assets is no longer just an external symbol, but a concrete manifestation of the individual's "self" in the digital field, a symbol of their power and ability in the digital world. A rational understanding of the operating mechanism of Bitcoin can help users utilize this tool more effectively, enhance its "power" in the digital economy, and better achieve its goal of "self preservation". 2、 Fichte's perspective: The agency of the "self" and the establishment of digital ownership Fichte's subjective idealism emphasizes that the "self" is the absolute starting point of consciousness and knowledge. In the human-computer interaction of Bitcoin, users act as active "selves" and establish absolute ownership of specific UTXOs by generating and storing private keys. UTXO, as a form of 'non self', is entirely determined by the 'self' holding the corresponding private key in terms of its value and disposability. By sending transactions, users are actually the active behavior of themselves in the digital world, shaping the flow of value in the Bitcoin network. The decentralized nature of Bitcoin gives users unprecedented autonomy, and their decisions directly affect the fate of their digital assets. This direct sense of control is in stark contrast to the traditional financial system's reliance on intermediary institutions, and is more in line with Fichte's emphasis on the agency and independence of the "self". Having a private key and controlling UTXO is a direct manifestation of the "self" establishing its own ownership and sovereignty in the digital field. 3、 Mach's perspective: the experiential composition of sensory elements and digital ownership Mach's experiential criticism holds that knowledge comes from sensory experience. In the human-computer interaction of Bitcoin, users construct their cognition of Bitcoin through visual (wallet interface, transaction information), tactile (operating devices), and understanding of abstract concepts (blockchain, keys). The user's sense of "self" about their Bitcoin assets can be seen as a collection of various sensory elements generated when interacting with the Bitcoin system, such as account balance numbers, transaction success prompts, etc. As an information unit on the blockchain, UTXO itself is a neutral 'sensory element'. However, when a UTXO is associated with a user's private key, this information is directly linked to the user's' self '. The user's control over UTXO ultimately manifests in their ability to initiate transactions through private keys and change the state of UTXO. This control is directly felt by users at the experiential level and forms the basis of their digital ownership. From Mach's perspective, ownership of Bitcoin is not a metaphysical concept, but rather an experiential reality formed by users during their interaction with the system. 4、 Afannus' perspective: the unity of "central item" and "project proposal" and the extension of self Avenarius' principle of conformity emphasizes the original unity of experience, believing that the "self" (central term) and the environment (for project proposal) are inseparable. In the human-computer interaction of Bitcoin, the user (central item) and the Bitcoin system (project proposal) form a unified experiential whole. The ownership and control of UTXO by users is not just the possession of external objects, but an extension of the "self" in the digital environment. Although UTXO is an information entity on the blockchain, it is "embedded" in an individual's digital self through the ownership of the key. The state of having UTXO directly maps to the user's self-awareness, becoming an important component of the self-concept of 'what I have'. This mapping goes beyond simple cognitive understanding and is a deep internalization of psychological identification and ownership. UTXO is no longer just an external digital asset, but a carrier of individual digital identity and value, closely linked to individual self-awareness. Conclusion: Deep Mapping of Ownership and Digital Self The uniqueness of Bitcoin's human-computer interaction lies in its direct association between digital assets and individual selves through a key ownership mechanism. UTXO is not just a data unit on the blockchain, but more like an extension of the "digital self" carrying ownership information. Individuals can directly own and control UTXOs by controlling their private keys, which greatly enhances their sense of ownership and makes digital assets truly a part of themselves. From a philosophical perspective, Bitcoin's human-computer interaction challenges the traditional concept of ownership and demonstrates the extension and reshaping of self-concept in the digital age. It is not just a financial tool, but also a way for individuals to establish their sovereignty and value in the digital world. Understanding the profound mapping between ownership and digital self can help us gain a deeper understanding of the social significance and future potential of Bitcoin, as well as the evolving relationship between humans and technology in the digital age.