Silkroad was to Bitcoin as Tokens were to Ethereum.
If a currency gains adoption, many altcoins will follow suit. Many cryptocurrencies can do what Bitcoin did in 2010, some currencies can do what Ethereum did in 2017.
The important question is:
What can you only buy with your cryptocurrency?
What makes adoption necessary, inevitable, desirable, specific?
This is the use-case you seek.
Ubiquity is not the use-case of Bitcoin Cash, yet—and it may never be without a stepping stone.