Is BitMEX legal?

I understand that BitMEX is a popular cryptocurrency derivatives trading platform, but I'm curious about its legal status. Could you clarify whether BitMEX is legal to use, especially for traders in different countries? Are there any specific regulations or restrictions that traders should be aware of when using BitMEX? I'm particularly interested in understanding the legal framework surrounding BitMEX and its operations, as well as potential risks or liabilities that traders may face. Thank you for your insights.