Qtum kursQtum · QTUM

Qtum is a decentralized blockchain network that supports smart contracts using the Ethereum Virtual Machine. The blockchain itself is based on Bitcoin’s UTXO model, but uses proof-of-stake for consensus. Because Qtum is a hybrid project that takes the best parts of Ethereum and Bitcoin, it also has the ability to merge future updates from these projects and place them on top of the Team’s own unique developments. Qtum is truly decentralized, there’s no “delegated” Proof of Stake, or other forms of masternodes required to make it appear fast. Anyone can participate in the transaction validation process, all they require is an internet connection and a device that can run a node. There’s no need to hold coins or vote for a centralized validator. Block targets are set to average 32 seconds, and up to 8000kb of data can be stored in each block. Bundled with SegWit, it’s possible to achieve 1100 transactions per second. Because Qtum is based on Bitcoin, if necessary, a Layer2 network can push this throughput to “millions or billions” of transactions per second with Lightning. The Qtum project supports multiple token standards, including its own implementation of Ethereum’s ERC-20, dubbed QRC-20. Qtum also integrated the BRC-20 standard that appeared on Bitcoin, dubbing it qBRC-20. Along with NFT support, Qtum offers developers more than Bitcoin or Ethereum can do independently. To learn more about this project, check out our deep dive of Qtum. QTUM'S ICO The project was announced in March 2016 and held an ICO a year after, in March 2017, which brought its founders $15 million USD. The Qtum main chain was released on Sept.13, 2017. Initially, the Qtum coin was issued as a ETH-20 token, but with the launch of the mainnet, it was converted to native blockchain. It is confirmed that Qtum has several high-profile backers, including the Bitcoin.com’s Roger Ver and Jeremy Gardner, an early crypto investor turned skincare professional, co-founder of Augur and EIR in Blockchain Capital.

What Makes Qtum Unique?

Qtum is a general purpose blockchain that tries to address four issues its founders found most problematic in BTC and ETH blockchain platforms: interoperability, governance, rigidity and costliness of proof-of-work mechanism and difficulty of connecting smart contracts with real life applications. The Qtum blockchain has two unique technologies that aim to solve that: Account Abstraction Layer (AAL) and Decentralized Governance Protocol (DGP). The Account Abstraction Layer integrates the UTXO (Unspent Transaction Output) account layer inherited from Bitcoin with the smart contract layer, inspired by Ethereum. The Decentralized Governance Protocol allows smart contracts to change the core parameters of the network such as block size and gas fees without ever needing to hard fork the blockchain, which may save a lot of trouble as the network is evolving. Miners (stakers), developers and QTUM holders within the entire ecosystem are involved in blockchain governance through voting, and the blockchain can realize self-management, upgrades and iteration. Related Pages: Ready to learn more? Visit our learning hub. Check out our blog for the latest crypto news and insights.

How Many Qtum (QTUM) Coins Are There in Circulation?

According to the Qtum whitepaper, the initial supply of QTUM coins was 100 million, all of which were minted instantly before the project went online. 51 million coins were sold to the public through an ICO process in March 2017. Over that, 8 million coins went to the early private investors and 12 million were allocated to the project team with a four-year lock-up. The rest is controlled by the Qtum Chain Foundation, a non-profit company registered in Singapore, which will receive it in four parts by March-2021. These are 20 million coins allocated for business development purposes and 9% for academic research and promotion. The coin supply is not fixed, new tokens can be mined with block reward halving every four years from the initial block reward subsidy of 4.0 QTUM per block, going through seven halvings to eventually reaching zero by year 2045, when the maximum supply will reach 107,822,406 QTUM.

How Is the Qtum Network Secured?

The technical approach to Qtum is not the same as Bitcoin and Ethereum currently use. Qtum chose the MPoS (mutualized proof-of-stake) consensus mechanism for network security. It is a modified version of Proof-of-Stake 3.0. The protocol incentivizes users to keep their coins locked to facilitate and secure the block validation. This is called staking. Confirming each block is a competition between coin holders, where based on connectivity to the network and random chance they get to right to validate the block. Unlike the early PoS protocols, here the block reward is constant and does not depend on coin age for determining the likeliness of getting it. The rewards are spread proportionally to the stake, so the more coins are staked, the more reward the user gets. On top of that, the MPoS protocol is protected against “junk contract” attacks by splitting 10% of the block reward between the block producing miner and nine previous miners and delaying the remaining 90% by 500 blocks in the future. Unlike the proof-of-work mechanism used in Bitcoin, the proof-of-stake algorithms are significantly less costly to maintain, are more environmentally friendly and can provide a great deal of decentralization, which is the cornerstone of blockchain security.

Where Can You Buy Qtum (QTUM)?

QTUM is a freely-tradable token, available on most exchanges. Pairs available for trading include Bitcoin and altcoins, stablecoins and fiat money. The top exchanges for trading in Qtum are currently Binance, Huobi Global, OKEx, HBTC and Hydax Exchange. You can find others listed on our crypto exchanges page.