Quero conseguir fazer isso !!!

[moedas] => Array
        (
            [BTC] => 0.07634
            [ETH] => 0.00103(
            [LTC] => 0.006787
            [XMR] => 0.006351
            [ZEC] => 0.00144
            [MD_DT_CAD] => 2017-08-14 02:16:44
        )