Here's the email that I received for reference:
"Hi,
Thank you for recently creating an account with Coinbase. You'll have access to the following services on your account:
...
At this time, you're not currently eligible to receive the following services on your account:
...
Sincerely,
The Coinbase team"
How long ago did you create your account?
It's not unusual to have restricted access to some trading functionality shortly after creating an account, it actually prevents kiting and fraud attacks on the financial institution because you can show a credit for a balance immediately but not yet have funding fully verified by the receiving firms account. It's a negative implication of the archaic fiat based financial payments system, which when dealing with fiat and crypto, as Coinbase does, is impossible to avoid.
Have you asked Coinbase how long the restrictions will last? Call them on the phone. It's reasonable for them to give you a time frame to expect.
Separately we've heard of some instances where accounts have been frozen but the instances are so few that it doesn't indicate some longer term nefarious activity from Coinbase. I suppose more data points need to be collected.