Futures or “Futures Contracts” are financial instruments where you agree to buy or sell something at a certain price at a certain point of time in the future. For instance, if the price of a certain cryptocurrency is USD 100, and you believe that the price of such cryptocurrency will sky-rocket, it can be a good idea to buy a Long Future. By doing so, you don’t need to invest the full purchase price now but can do so at a later stage.