https://blog.coinbase.com/adding-erc20-support-to-coinbase-fe9cba6782b
With GDAX closed and coinbase an all in one place, we can expect coinbase turning into a standard exchange just like binance with direct USD pair of course. Binance too are looking for it but coinbase with it's american presence (and american restrictions) can be a successful exchange.
Maybe this will be possible, even if I still see binance more like an exchange and CB just a wallet. They will need time to change things I guess. We'll see if this happens, which kind of service they will offer.