A major shock has hit the Asian markets as South Korean authorities launch a probe into defining "held assets" following a significant technical error at a top regional exchange involving 620,000 Bitcoins. This event has reignited the debate over custodial transparency and the legal status of digital holdings. The "Bithumb Shock" has caused a local price "discount," where assets trade lower in Korea than globally, reflecting local panic. Regulators are now fast-tracking a new framework that could mandate 100% reserve backing for all centralized platforms. This move is expected to influence how other G20 nations approach crypto consumer protection in 2026.