Qtum is a decentralized and open-source smart contracts platform and value transfer protocol. Qtum uses proof-of-stake consensus, meaning node operators are rewarded for validating transactions. It is a DGP governed blockchain where community participants can vote to change certain network parameters. Qtum is built on a bitcoin core fork, but the foundation has created its own hybrid blockchain with the help of several key tools. The coin uses bitcoin’s chain because of its simple and stable nature, allowing the foundation to build upon it more easily. As the QTUM project is a hybrid of Bitcoin and Ethereum, its team comprises of members from both Bitcoin and Ethereum community. They also have team members who formerly worked with Tencent, Alibaba, Nasdaq etc. Apart from that, they are backed by some notable VCs and prominent people from the Blockchain community such as Patrick Dai (Project Co-Founder), Neil Mahi (Chief Blockchain Architect/Co-Founder) and Jordan Earls (Lead Developer/Co-Founder). Qtum provides a Turing-complete blockchain stack and is able to execute smart contracts and decentralised applications like the Ethereum blockchain. Qtum builds on Bitcoin's UTXO transaction model and uses the Proof-of-Stake algorithm. It is backed by some highly prominent members of the blockchain community such as Anthony Di Iorio, Xu Star, Bo Shen, David Lee, Jehan Chu and Roger Ver. Qtum sold over 10 million dollars’ worth of its tokens after only 90 minutes, eventually raising a total value of $15.7 million before stopping the campaign early after only 5 days. They raised a total amount of 11,156.766 bitcoins (BTC) and 77,081.031 ether (ETH) in exchange for the 51 million Qtum tokens being distributed to the public. In Qtum’s whitepaper, 51% of the coins were distributed to the public via the crowdfunding campaign. Of the remaining 49%, 29% of the coins would be allocated as community incentives, and the remaining 20% would be distributed to the early backers and development team.
ICON is a blockchain technology and network framework designed to allow independent blockchains to interact with each other. ICON is supported through a cryptocurrency token, called ICX. ICON is a South Korean-based company that developed a blockchain technology and accompanying cryptocurrency token called ICX. The company bills itself as an interconnected blockchain network, allowing participants in a decentralized system to “converge” at a central point. This is done by connecting a community to other communities through ICON Republic and Citizen Nodes. While blockchains are most commonly associated with cryptocurrencies, enthusiasts point out other areas where the technology can be applied. Any exchange of information can technically be added to a blockchain, though adding some types may not be cost-effective. Transactions involving securities, currencies, business contracts, deeds and loans, intellectual property, and personal identification could be “tokenized. ICON’s blockchain is more like the Plasma or Ontology blockchain in that its purpose is to act as an intermediary between other blockchains and networks. This interconnectability makes the ICON project worth keeping an eye on over the next decade. ICON sports its very own decentralized exchange. This DEX sets currency reserves for each blockchain community so that ICON communities can exchange value in real time through the ICON Republic. In this way, DEX complements C-Rep portals by establishing another gateway for ICON Communities to connect to the ICON Republic.