--- image: https://i.imgur.com/x3dvKfW.png --- *Decentribe White Paper* ![](https://i.imgur.com/gXZFjId.png) # CoinEmpire: Our Flagship Crypto Price Prediction DApp :::info *CoinEmpire Development Status: 30% Complete* ::: :::success <i class="fa fa-info-circle fa-fw"></i>Summary *What is CoinEmpire and How is it Played?* - CoinEmpire is a virtual real estate property trading game where players compete to build monopolies on properties that pay ETH income. - CoinEmpire properties match individual ETH price points (e.g., $188.90) or price ranges ($188.90 - $188.99). - Every 15 minutes the CoinEmpire oracle takes a snapshot of the current ETH/USD price. CoinEmpire properties pay income to owners every time ETH's price matches a property's price or falls within a property's price range.  - Players can trade properties and improve them to earn additional ETH ::: --- <center>CoinEmpire Game Trailer</center> <iframe width="560" height="315" src="https://www.youtube.com/embed/KVBxWLMu1RM" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> CoinEmpire is a DApp where players compete to build a monopoly on virtual price real estate that pays ETH income every 15 minutes. The first version of the game will take place in a Steampunk-themed 2D city called ETHLand. We will release future CoinEmpire cities in the future, based on other cryptocurrencies such as Bitcoin and Binance Coin. The DApp: - Mimics the buy, hodl and sell activity crypto enthusiasts engage in daily - Offers players passive income generating activities **CoinEmpire's Gameplay** Monopoly is the world's most popular property trading game, played by millions for more than 70 years. Because of this the rules of Monopoly are familiar to most. Anyone who has played Monopoly will understand how to play CoinEmpire. The table below compares CoinEmpire's game play rules to Monopoly's. ![](https://i.imgur.com/nrsaMjo.png) CoinEmpire properties pay income every time ETH's price matches a property's price or falls within a property's price range.  How do we determine the price? Every 15 minutes we take a snapshot of the ETH/USD price (using an external oracle), which is used to determine which properties earn income (payed in ETH). *CoinEmpire Property Types and How They Earn ETH Income* CoinEmpire features three property types (see table below). ![](https://i.imgur.com/mrf3Uyg.png) **Making Profit on Properties** As indicated above, players can purchase these properties (using ETH) from the CoinEmpire smart contract, or from other players Each time a property is purchased, its price increases. Properties can only be owned by one player (or ETH account) at a time. *CoinEmpire Strategy: Predict the Price, Earn More ETH* The centerpiece of the CoinEmpire playing strategy is making accurate predictions about ETH's future price (and other cryptos in the future). Players can use this information to make decisions about which properties have the most earning potential. ![](https://i.imgur.com/S26Sxa8.png) As shown in the image above, players can choose to buy properties:  - **Close to ETH's Current Price**: Properties in the "hot zone," or close to ETH's current price are more likely to pay out income (and will be more expensive to purchase)  - **Above or Below ETH's Current Price**: Players can go long or short on ETH by buying (and improving) properties further above or below ETH's price, and betting that the properties will either earn income or be purchased by other players in the future.  Buildings and blocks will pay income more often. This is because it is:  * More likely that ETH's price will fall within the 10 or 100 point price range represented by a floor or building  * Less likely that ETH's price will match an individual price point represented by an apartment CoinEmpire players can extend their strategies and profit potential by using non-fungible tokens (NFTs), which will allow players to: - **Hold**: Keep earning from profitable properties (by preventing other players from buying them for a period of time)  - **Improve**: Level up real estate and sell it for higher profits  - **Earn**: Collect a share of passive income generated by all CoinEmpire economic activity (buys, sells and property improvements) Learn more about [CoinEmpire NFTs](/yLigQ18uRGy-dM65ZWJ1xw). ## Fetching Accurate Crypto Prices To fetch coin prices for all our price prediction DApps, we use Oraclize, a framework that allows smart contracts to query data from external sources. Oraclize is used by a range of blockchain companies to secure off-chain data, including Axie Infinity (to determine Axie breeding results). Note: Oraclize is now named Provable. Oraclize provides verifiable proof for every fetch, so anyone can check the validity of price data. Our contracts set the maximum security level for oraclize (this comes with an overhead price for every fetch). CryptoCompare is the provider for all of our price prediction DApps. *Why Not CoinMarketCap?* CoinMarketCap has a 5 minute latency meaning less precision in price checking. Due to this it would be impossible to take price snapshots at the frequency required by CoinEmpire. [Next: Crypto Races & Crypto Challenge: On-Demand Competitions to Determine Who Has the Best Price Prediction Skills](/-kxcHsDtQveG2nBg2a_l2g) [Back to White Paper Table of Contents](https://hackmd.io/@decentribeTEAM/Decentribe_Whitepaper)