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Digital assets and currencies

Understand assets, networks and trading mechanics with sources you can check.

Fiat currencies

Compressed tea

Compressed tea, called tea bricks, tea cakes or tea lumps, and tea nuggets according to the shape and size, are blocks of whole or finely ground black tea, green tea, or post-fermented tea leaves that have been packed in molds and pressed into block form. This was the most commonly produced and used form of tea in ancient China prior to the Ming Dynasty. Although tea bricks are less comm

Trading basics

Food delivery

Food delivery is a courier service in which a restaurant, store, or independent food-delivery company delivers food to a customer. An order is typically made either by telephone, through the supplier's website or mobile app, or through a third party food ordering service. The delivered items can include entrees, sides, drinks, desserts, or grocery items and are typically delivered in box

Trading basics

Free lunch

A free lunch is the provision of a meal at no cost, usually as a sales enticement to attract customers and increase revenues from other business. The practice was once common in saloons and taverns in many places in the United States, with the phrase appearing frequently in U.S. literature from about 1870 to the late 1920s. These establishments included a "free" lunch, which varied from