This article focuses on the effectiveness of using cryptocurrencies as a means for international payments, with an emphasis on the analysis of cost, speed, and security of transactions. The aim of the study is to explore the potential of blockchain technologies to optimize international financial operations. This research considers the performance of cryptocurrencies in international payments, focusing on an analysis of cost, speed, and security of transactions, utilizing data from various sources and case studies. Blockchain technologiessuch as Ripple and Solana demonstrate high throughput, capable of processing up to 65,000 transactions per second (TPS).In comparison, traditional banking systems offer significantly lower processing speeds, withBitcoin handling around 7 TPS and Ethereum up to 15 TPS. The anticipated Ethereum 2.0 network upgrade projects an increase to 100,000 TPS, significantly enhancing their potential in international payments. Traditional banking transactions can incur fees of up to $50 USD, whereas blockchain networks can reduce costs to less than $0.01 per transaction. The implementation of distributed ledger technology could save up to $27 billion by 2030 on international transactions. According to research, the average cost of an international remittance is 6.4% of a $200 transaction, indicating the potential for significantsavingsthrough the adoption of cryptocurrencies. Cryptocurrency payments are protected using cryptographic methods and decentralization, reducing the risks of fraud and attacks. By adhering to "privacy by default" principles, transaction confidentiality can be further enhanced, including generating new addresses for each transaction. Regular security audits and multi-factor authentication provide an additional layer of protection. It can be asserted that blockchain technology offers significant advantages in speed, cost, and security of transactions, which could radically transform the landscape of international trade and financial transfers. The practical significance of the research lies in identifying the potential of cryptocurrencies as a reliable, cost-effective, and secure tool for international payments, which may alter the global money transfer system.