The reason for the Korean stock market crash is that the conflict between the US and Iran caused oil prices to surge, which directly led to a sharp increase in the costs of Korean semiconductor and chemical factories. Korea is already a country highly dependent on imports from the Middle East. Coupled with foreign capital withdrawal from the stock market for risk aversion, this ultimately caused the Korean won to plummet and the stock market to collapse.

Looking at history, as long as a ceasefire is reached, Korea's stock market will definitely rebound strongly because of the urgent demand for AI industry components. The supply disruptions caused by war are temporary, but the global demand for high-bandwidth memory (HBM) from Samsung and SK Hynix is long-term.
Therefore, after the big drop, you can gradually buy the stocks of Hynix and Samsung in batches, and just wait for the conflict to end to cash out.