The Coin app is a free-to-use social application that earns users in-app currency, called Coin, which can be exchanged for digital and physical rewards. Using the app, users can compete against their friends to claim regions on a map and win sweepstakes. The app also enables users to earn by referring friends and completing milestones. In addition, users can work in teams to increase their chances of winning. The app has partnered with the XYO foundation to ensure that users’ locations are verified. This prevents users from cheating and getting the rewards of other people’s achievements.
Coins have long been prized and hoarded, often buried for safety and later dug up. Their value depends on their condition, specific historical significance, rarity, beauty of design and general popularity among collectors. They are used as a medium of exchange, as investments, and for speculation.
They are a significant source of information about past economic history and chronology. Study of the distribution of coins may help define the extent of a city or state’s dominion, and illustrate major commercial connections.
Until the development of paper money in medieval Europe and the invention of gold coins in China, metal coins were the primary medium of exchange. Because they possessed intrinsic value and a symbol of sovereignty, the coins of ancient civilizations were particularly prized and frequently buried in large numbers for safe keeping. They have therefore been recovered in great numbers and yield a wealth of data.
In most countries, the face of a coin bears an image of a monarch or other authority, or a national emblem. The other side of the coin bears various types of information, including the year of minting. The side of the coin bearing the monarch or other authority is called the obverse, while the other side, which usually shows various types of information is the reverse.
Historically, the value of a coin was based on its precious metal content, but since the invention of paper money, the values of most coins are derived from their nominal face value. A rare exception is the gold-plated bullion coin of Canada and the United States, which has a face value much lower than its metallic content. This is an example of debasement, in which a percentage of the coin’s precious metal is replaced with less valuable material. It is done to reduce the cost of production, but also for political and psychological reasons to make coins seem more valuable to the public.