Because of decentralized financial services, financial inclusion, remittances, and inflation hedging, the use of cryptocurrencies is rapidly growing in emerging countries. Traditional banking systems fail to provide these benefits, while cryptocurrencies provide affordable transactions, international payments without boundaries, and banked access for unbanked communities. Nations with volatile currencies, high levels of remittances, or tight financial control are increasingly finding digital assets acceptable as a second currency to complement fiat money. Yet, the challenges of regulatory uncertainty, volatility, cybersecurity threats, and infrastructure constraints cap its wholesale adoption. This paper examines the major drivers, advantages, and threats to the adoption of cryptocurrency in emerging economies, reviewing case studies and projecting future trends in this changing financial environment.