Guardian Holdings and CoreDAX, two coin-only crypto exchanges, had no external insurance coverage as of Aug. 14, Maeil Business TV reported. The report cited data the Financial Supervisory Service provided on Sept. 2 to South Korean lawmaker Park Sang-hyuk of the Democratic Party. Both exchanges had previously held policies covering 500 million won for one year from July 19 last year but did not renew them after expiration. The other 26 operators either maintained internal reserves or purchased insurance offering at least 500 million won in coverage. South Korea does not uniformly require exchanges to hold external insurance, leaving differences in how operators protect customers against losses linked to hacks, system failures or other incidents.