Is BYDFi legal in the US?

Could you please clarify for me if BYDFi, the cryptocurrency platform or service that you're referring to, is currently deemed legal for use within the United States? I understand that the legality of cryptocurrencies and related platforms can vary depending on the specific jurisdiction and the regulations in place. Therefore, it's important to have a clear understanding of whether BYDFi complies with all necessary laws and regulations in the US before engaging with it. Would you happen to have any information on this matter, or could you direct me to a reliable source where I can find out more?