All the names so far is great but you do not have to use Something Trade Capital , you can be creative and find any name , just because this name is BlackTradeCapital , it doesn't have to be similar.

 So far I liked NewbieCapital and KuraiCapital , NewbieCapital might won if noone else does and Kurai is a close second but I do not know a single word of japanese or every interested in manga (hell not even enjoy hentai , why are there tentecales there!?!? ) so japanese is a far fetch one.

 Maybe something Latin guys? Or totally unrelated to blacktradecapital?