Coinbase down for me too. Coinbase.Pro just has a loading widget.
This is a total scam. Just like Bitmexs' "overloaded"
When the good opportunity to buy is there. They take away the buy button.
Coinbase in the past have lost my deposits and others, only to magically find them 2 weeks later when price has skyrocketed.
These 'crashes' are deliberate of that I am certain.
Don't trust any exchange.