In order to determine if the transaction involving C98 Coin (Coin98) is legal, we need to consider a few factors. First and foremost, it is important to understand the legal status of cryptocurrencies in the jurisdiction where the transaction is taking place.

Cryptocurrencies are a relatively new and rapidly evolving technology, and their legal status varies greatly from country to country. Some countries have embraced cryptocurrencies and have established clear regulations for their use, while others have banned or severely restricted their use.

If the transaction involving C98 Coin is taking place in a country where cryptocurrencies are legal and regulated, then it is likely that the transaction is legal. However, even in countries where cryptocurrencies are legal, there may be specific regulations governing their use, such as anti-money laundering (AML) and know your customer (KYC) requirements.

It is also important to consider the nature of the transaction itself. If the transaction involving C98 Coin is for a legitimate purpose and is not being used for illegal activities such as money laundering or fraud, then it is more likely to be considered legal.

Additionally, it is important to ensure that the parties involved in the transaction are complying with any applicable laws and regulations, including tax laws. Failure to comply with these laws could result in legal consequences.

In conclusion, whether a transaction involving C98 Coin is legal depends on a variety of factors, including the legal status of cryptocurrencies in the relevant jurisdiction, the nature of the transaction, and compliance with applicable laws and regulations. It is recommended to seek legal advice if there are any uncertainties regarding the legality of the transaction.