I believe that not all crypto currencies should be a currency, at least in the sense of using it as money. Ethereum (and Ethereum clones), for example, serve a more noble goal, because Blockchain Ethereum technology acts as a global virtual computer that can be used for smart contracts and other applications. Despite the fact that they are currently used for multiple launches of ICOs (initial placement of coins), these sales of tokens are simply an insignificant part of the potential of Ethereum.