Hashkey Exchange's plan to issue an ERC-20-based token HSK is an interesting development. The issuance of a new cryptocurrency token can be associated with various purposes, such as raising funds, enabling utility within a platform or ecosystem, and more. The exact details and use case of the HSK token would need to be clarified by Hashkey Exchange.

It's also important for users and potential investors to exercise caution and conduct thorough research when dealing with new tokens. The cryptocurrency space has seen various projects and tokens launched, some of which have proven to be scams or of little value. Always ensure that the token and platform issuing it are legitimate and well-vetted before engaging with them.