If you have a Coinbase account, you have access to its backend exchange called Coinbase Pro, formerly known as GDAX. You can log in here with your Coinbase username and password.
Make sure you add Two Factor Authentication to better protect your account and funds!
If you don’t have a Coinbase account, you can get 10$ worth of Bitcoin for free when you sing up with my invite link. https://www.coinbase.com/join/57ed6a1cc1c7780079c46461
Try to keep your money out of central banks! Crypto exchanges offer a great alternative, however it is up to you to manage your own finances. Life starts at the edge of your cpmfprtzone..
Not investment advice.. Bitcoin could shoot to $100,000 tomorrow… Join the ride or sit back and watch..