The main difference between depositing and sending cryptocurrency is the direction of the transaction. When you deposit cryptocurrency, you add it to your BCM account. This usually includes transferring cryptocurrency from an external wallet or exchange to your BCM account. So depositing is actually receiving cryptocurrency.

On the other hand, sending cryptocurrency involves transferring it from your BCM account to another proprietary wallet or exchange. When you send cryptocurrency, you send it to another account that you manage. Thus, sending is the same as withdrawing.