Digix makes it possible to buy gold in an efficient manner via cryptocurrency by providing investors with a tokenized version of gold so you don’t have to physically own or store it. Digix has two cryptocurrencies, Digix Gold (DGX) and DigixDAO (DGD), each of which serves a key role in the structure. The company proudly gets 99.99 percent of its gold from LBMA-approved refiners, with zero percent from fractional reserves, delivering confidence. With Digix, investors can take advantage of the stability and value of gold as well as the ease of cryptocurrency. Digix essentially tokenizes gold within Ethereum. It takes advantage of the Distributed Ledger’s immutability, auditability, and transparency, applying all these benefits to the precious physical asset of gold. Additionally, Digix has developed multiple technologies, such as the DGX tokens and introduced a new Proof of Asset protocol (POA). A key feature of Digix is its physical gold bullion. By investing, users buy bullion from the LBMA refineries, including the Assay Certificates from refiners like Nadir Bullion, PAMP Suisse, Valcambi, and others. For security, Digix includes third-party auditing from Bureau Veritas. Every quarter, it audits each gold asset within the safehouse vaults. This auditor has been in business since 1828 and is a world leader in certification, inspection, and testing services. With such a long track record, investors should be able to trust Bureau Veritas for their auditing services. Finally, Digix involves recast, which means customers can take their DGX delivery at the partnering custodial vault. Digix incorporated in Singapore in December 2014 and the DGD crowdsale took place on March 30th, 2016. It was the first ever crowdsale and major Distributed Autonomous Organization hosted on the Ethereum network. The sale intended to run for 30 days but met its 5.5 million dollars hard cap in just 12 hours, selling 1.7 million DGD tokens and reserving 300,000 for the Digix team. Pledges who sent over 15,000 USD worth of Ether received a special badge which will allow them to submit proposals to the DigixDAO. For better or worse, when you see the word DAO, you might think of hacking. In July 2017, over 4000 DGD were indeed stolen due to a vulnerability in the crowdsale smart contract. The bug was eventually fixed and the tokens reimbursed to the 35 affected addresses. In January 2018, the vast majority of the cryptocurrency market crashed. DGD was the only coin in the top 100 to rise in value in that time. Perhaps this is an early indicator that people will seek gold as a safe haven during times of market uncertainty. The ICO price of DGD was about 3 dollars, but in 2018, DGD reached an all-time high of over 400 dollars. When Digix finally delivers the DGX tokens and the rewards to DGD participants start rolling in, we might see an even higher demand for DigixDAO. When DGX goes live, it will be available for purchase with Ether on the Digix marketplace.
QuarkChain is a secure, permission-less, scalable, and decentralized blockchain. One of the goals of QuarkChain is to utilize sharding technology to deliver over 1 million transactions per second (tps). Essentially, QuarkChain markets itself as a peer-to-peer blockchain with a high capacity throughput to help deliver fast and secure decentralized applications. The team behind QuarkChain created this blockchain to resolve the issue of scalability that all the major blockchains are currently facing. The team feels that because of the urgency of this issue, the Bitcoin community simply cannot afford to wait until they all agree on a solution. Instead, they feel that by offering different solutions, such as the one inherent in QuarkChain, this compels the community to split via a hard fork and find the solution that works best. QuarkChain encourages increased decentralization through multiple cheap nodes that then create a cluster that works as a super-full node. This prevents the high expenses associated with super-full nodes when the tps gets high. In terms of protection, all transactions within QuarkChain get the protection of 50 percent of the network’s hash power. This makes a double-spending attack incredibly challenging, particularly when combined with QuarkChain’s decentralized nature. QuarkChain relies on a two-layer blockchain structure. Sharding blockchains known as shards are the first layer, while the second layer is a root blockchain that confirms the shards’ blocks.The major work on QuarkChain began in Q2 2017 with research into the problem of blockchain scalability. In Q4 of that year, the team drafted the whitepaper. In February 2018, it released the white paper and completed verification code 0.1. March 2018 saw the 0.1 versions of both the wallet and testnet. Now in Q2, the team is working on the testnet 1.0 and smart contract 0.1. In Q4 2018, the team will have the QuarkChain Core 1.0, along with the mainnet 1.0 and the SmartWallet 1.0. By Q2 2019, both the SmartWallet and QuarkChain Core will be in their 2.0 versions. QuarkChain is a decentralized blockchain network that aims to resolve the issues of scalability that plague existing networks by using sharding technology. In this way, QuarkChain can dramatically extend the usefulness of blockchain technology since many applications are limited by the scalability of existing blockchain networks. The project is still in progress, but QuarkChain has already made many positive steps and already began invite-based beta testing for the testnet, showing significant progress and potential. The main features of Quarkchain are: 1. Reshardable two-layered blockchain: Quarkchain consists of two layers of blockchains. We apply elastic sharding blockchains (shards) as the first layer, and a root blockchain as the second layer that confirms the blocks from the first layer. The second layer that confirms the blocks from the first layer. The second layer is flexible to be resharded as needed without changing the root layer. 2. Guaranteed security by market-driven collaborative mining: To ensure the security of all transactions, a game-theoretic framework is designed for incentives, where at least 50% of overall hash powers are allocated to the root chain to prevent double spending attack on any transactions. 3. Anti-centralized horizontal scalability: In any blockchain network with a high TPS, a super-full node can be extremely expensive, which encourages centralization. In contrast, QuarkChain allows multiple cheap nodes forming a cluster to replace a super-full node. 4. Efficient cross-shard transactions: Cross-shard transactions in QuarkChain can be issued at any time, and confirmed in minutes. The speed of cross-shard transactions increases linearly as the number of shards increases. 5. Simple account management: There is only one account needed for the entire blockchain (shards) in QuarkChain. All cryptocurrencies from different shards are stored in one smart wallet.