I would argue that the network effects belong to cryptocurrencies in general. Since there can't be any barriers of entry to implementing cryptocurrency exchange

I would argue that the network effects belong to cryptocurrencies in general. Since there can't be any barriers of entry to implementing cryptocurrency exchanges, exchanging them from one to another will always be trivial and cheap, if they have any kind of market. In fact, it is possible to make a hosted bitcoin wallet, which can be integrated with an exchange, and users can pay in any cryptocurrency the merchant requests. So I believe that the more different cryptocurrencies, the better.