ICON (ICX). Is an inter-chain block chain that connects various block chains such as Bitcoin, Ethereum, and Qtum. ICX is used as an intermediary crypto-currency. ICX enables transactions among different crypto-currencies by determining the exchange rate through DEX Reserve. ICX can be used as for DApp tokens U-coin, which is a DAPP developed by our block-chain team for Korean University Consortium, can be one of these use cases already in development.