Crypto-as-a-Service (CaaS) is rapidly transforming blockchain adoption by allowing banks, fintech companies, and payment processors to integrate digital assets through APIs and white-label platforms. This innovation significantly reduces deployment time from years to mere days. Leading companies such as Coinbase, BitGo, and Western Union are utilizing CaaS to provide services like custody, stablecoins, and cross-border payments. Additionally, DeFi protocols and real-world asset (RWA) tokenization are broadening institutional use cases. This model is poised to drive mainstream adoption by simplifying blockchain complexities and enabling seamless, cost-effective integration.