In cases like this, it all depends on how things are set in TOS (terms of service), and Coinbase made a very clear point about it. Although technically possible, this situation requires expert technical staff and is not desirable from a safety point of view. In other words, a return on your assets would only pose a security risk to the company.

I'm not sure, but I don't think Coinbase has an official representative on this forum, so I recommend you to try get their attention on Twitter or Facebook.