This study examines the evolution of financial technologies (FinTech), the provision of financial products and services by major technology companies (BigTech), Neobanks, InsurTech companies offering insurance services based on technological innovation, RegTechs that deliver products and services in the field of regulatory technologies, and FinTechs employing artificial intelligence (AI), machine learning (ML), data analytics, the Internet of Things (IoT), distributed ledger technologies (blockchain), and other emerging tools. The study further explores the development of open banking, data-sharing channels via Application Programming Interfaces (APIs), the services offered by TechFin companies, cryptocurrencies, and Central Bank Digital Currencies (CBDCs), with a particular focus on their impact on banking and the stability of the financial system. The first section, titled Digital Finance, discusses the effects of digital transformation on banks and the broader financial system. The second section, Financial Technologies, evaluates the factors leading to the emergence and growth of FinTech companies, the adequacy of regulatory frameworks, and the positive and negative impacts of FinTech activities on national financial systems. Within this context, two subtopics are addressed in detail: "The development of financial technologies globally and in Türkiye" and "Debates on the impacts of financial technologies on the banking sector." The study analyzes blockchain and cryptocurrencies under separate headings and emphasizes that while FinTech innovations have positive contributions to banking and financial systems, they may also pose certain risks. It is also noted that the relatively lighter regulatory oversight of FinTechs, compared to traditional banks, could lead to potentially disruptive consequences. Therefore, it is essential to implement specific regulations and supervision—both at the international and national levels—to mitigate such risks. In forming regulatory and supervisory frameworks, it is crucial to foster innovations that serve the public interest while closely monitoring developments that carry systemic risks..