Our employee trading policy at Coinbase
blog.coinbase.com
blog.coinbase.com
With cryptocurrency, it's possible to insider trade using completely pseudonymous/anonymous wallets and exchanges (outside of coinbase).
Coinbase will obviously fire anyone who did insider trading using a Coinbase wallet, but who would be that dumb?
Usually don't advocate for more government regulation but it really seems like the SEC could be more useful here.
What you can request is transparency, that this should have been said long before and in a much more transparent manner.