With litecoin moving after being added to Coinbase , the dash nation is wondering why not them. If Coinbase is smart they won't add dash till they fill out the top ten. Here's why:
vertical integration
Dash has it unlike other cryptos. Many cryptos depend on greater popularity to encourage third parties to build interfaces. Dash also has the treasury. The problem is the evolution upgrade, funded from the treasury takes the place of wallets. Most dash holders will use the evolution wallet once it is available. So if you are a wallet provider you are reduced to a fiat gateway or a service to change coins from one to another. As a fiat gateway you must compete vs pure plays and also those funded by the dash treasury. You are much better served by adding currencies that don't have dash infrastructure. Therefore because dash is vertically integrated it must develop everything itself. (Think apple vs ibm/Msft/intc in the 80s/90s)
yet Coinbase will likely eventually add dash
Though dash will likely be the last major currency to be added it makes sense for a company like Coinbase that makes money on fiat crypto conversions to add all the top currencies. However if I were them I would add monero etc golem augur and ripple before dash.
get evolution done and be careful about adding new vertical integration
For dash nation you need to get the wallet done. Also be careful about announcing further vertical integrations. If the project is announced it might prevent some. Network effects that the high market cap would get you.