By Gertrude Chavez-Dreyfuss NEW YORK (Reuters) – Bitcoin derivatives trading platform BTC.sx has secured funding from Seedcoin Fund, BTC.sx Chief Operating Officer George Samman told Reuters on Tuesday. The other five businesses are Cryptopay, CoinSimple, MexBT, Hive and zSIM, Seedcoin said in a statement. BTC, which started with a $150,000 investment, briefly suspended trading on its platform after its bitcoin exchange partner, Tokyo-based Mt. Gox, went dark in February following weeks of turmoil. Mt. Gox eventually filed for bankruptcy protection.