Did a hacker hack a South Korean crypto exchange?

Could you elaborate on the recent allegations of a cyber-attack targeting a South Korean crypto exchange? Has there been any official confirmation from the exchange or law enforcement agencies? What is the nature of the suspected hack, and what are the potential implications for the crypto market and investors? How secure are these crypto exchanges in general, and what measures should investors take to safeguard their assets? This incident has raised many questions about the safety and security of digital currencies, so it's crucial to have a clear understanding of the situation.