I would rather choose to use  Bittrex wallet than coinbase knowing that they dont want to support bcc which means if theres a split then you wont still able to get those bcc because coinbase doesnt support split unlike on bittrex or any exchanges which do implement or update when theres a split btc: bcc 1:1 ratio which means you can possibly get those 2 coins.If you can risk your bitcoin to have bcc then it would be fine but for me i wouldnt do such thing i would rather choose up electrum to store my bitcoins.