South Korea's major digital asset trading platform Upbit recently announced that it has suspended deposits and withdrawals of the FLOW token starting December 27 due to detected "signs of a security incident" on the Flow mainnet. The specific resumption date has not yet been announced.

On the same day, the Korea Digital Asset Exchange Association (DAXA) followed suit by issuing an investment risk warning regarding Flow. DAXA confirmed that the mainnet indeed has security vulnerabilities and will closely monitor the investigation, assessing whether to upgrade control measures—potentially including listing it as a "trading caution target" or directly terminating support.

What is the core issue behind this event? Flow is a blockchain platform designed for games, applications, and digital assets, with the FLOW token being its native token. From the market response, as soon as the news broke, the price of FLOW plummeted, with an instant drop of around 40%.

The underlying problem is quite straightforward— the security status of the underlying public chain directly affects asset safety and trading stability. Once the mainnet is exposed to risks, exchanges immediately cut off deposit and withdrawal channels, leading to panic selling among investors. Such events are worth paying attention to, as the health of the blockchain ecosystem often determines the long-term trajectory of assets within it.