Before exchanging currencies in an exchanger, it is important to pay attention to the following parameters:

minimum and maximum allowable amounts for exchange;
reserve of the exchanger of the desired currency.
Using bitcoin as an example, the current cryptocurrency rate is quite high, therefore, on most exchangers, the minimum amount for exchange operations with this cryptocurrency is at least $ 100. This must be taken into account in order not to waste time by filling out the application form and receiving a refusal from the system to perform the operation.

Each currency instrument of the exchanger has a real account with a certain amount of funds. It is she who makes up the reserve of the exchanger in a particular currency. If the reserve of the available amount is insufficient for the exchange, you can make a partial exchange and apply to another exchange. Or you can ask the support service about the timing of the replenishment of the reserve.