Guys be careful to use the service of coinbase even buying with credit card many coinbase users are halving problem about buying and funds stole from their remaining bitcoin balance in coinbase account..
Check their community forum
https://community.coinbase.com/t/coinbase-is-worthless/13272
https://community.coinbase.com/t/issue-with-gdax-money-missing/13107
https://community.coinbase.com/t/coinbase-balance-i-bought-uros-to-btc-on-thursday-morning-to-trade-today-is-saturday-and-still-it-says-arrives-on-thursday-what-is-happening-not-answer-from-support-yet-thank-you-very-much/13232

And many issue are happen right now with coinbase i just want to inform you guys to don't use coinbase right now..
I experience of decreasing my vault funds and now i am trying to transfer it to other wallet before they stole all my bitcoins..