As of now, Coinbase does not support the buying or selling of Luna on its platform. However, this could change in the future as the demand for Luna grows.
For now, those looking to invest in Luna will need to find another exchange that supports it.
This is unfortunate for those who were hoping to use Coinbase as their primary investment platform, but it is not the end of the world. There are still plenty of other exchanges that support Luna trading.
So long as the demand for Luna remains high, it is likely that more exchanges will start supporting it. In the meantime, investors will just have to be patient and use one of the many other exchanges available to them.