Services that centrally exchange digital assets have their own reserves at their disposal, at the expense of which transactions are made, and work on the principle of banks. The user chooses a currency pair, indicates the amount, transfers the asset being sold to the service account, and in return receives the desired cryptocurrency or the amount in fiat, depending on the direction of the exchange. They are easy to use, reliable, but do not always offer favorable conditions. Using an online cryptocurrency exchanger, transactions are carried out quickly and take only a few minutes. You can receive tokens to a cryptocurrency wallet, and fiat - to Visa and MasterCard bank cards.