Financial institutions face perpetual cyber threats targeting not just money, but personal data, payment systems, and economic trust itself. Breaches cascade from individual accounts to national infrastructure. Threat intelligence provides crucial defense by: (1) mapping attacker tactics, techniques, and procedures (TTPs) specific to finance; (2) enabling proactive detection of indicators of compromise before attacks succeed; (3) contextualizing threats to prioritize response; (4) informing security architecture decisions. Banks, insurers, and fintechs must shift from reactive incident response to anticipatory defense, using intel feeds to identify emerging campaigns, track adversary infrastructure, and harden authentication, data protection, and transaction monitoring systems against evolving attack vectors.