Encryption currency and block chain, which kind of network effect is more important?

We will see that there is a certain degree of synergy between the blocks, and we will see more interoperability between cryptographic currencies, of course, if all apps that are in the same block chain, together is more simple, but will also bring a network effect,, but this is not the main factor, if block chain can work as well. Encryption currency has liquidity, the synergy between them will be obtained through the transaction, as long as allowing an encrypted currency can simply be converted into another encrypted currency.
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Encryption currency and block chain, which kind of network effect is more important?