On July 13, 2018, Coinbase announced their intention to consider the possibility of adding 5 more cryptocurrencies to their platform. This was after the company announced to be considering the addition of Ethereum Classic back to its platform (they have since announced that ETC will be available to Coinbase Consumer users starting August 16, 5pm PST).
The choice of cryptocurrencies to be listed by Coinbase does not come by mere guesses or familiarity. The choice is made based on a framework the company designed in November 2017. In this document, which is called Digital Asset Framework, Coinbase publicly outlines its process for choosing which coins to list.
The Digital Asset Framework has 6 sections: mission and values, technology, legal and compliance, market supply, market demand, and cryptoeconomics. A coin that meets the criteria in these 6 sections is considered worth listing.
There is no information indicating that Coinbase could be announcing any other listing consideration…