Banks traditionally made a fortune by making a little bit of money daily off each account. This did not add up to much until you spread that over tens of thousands of accounts (millions for the big banks). Then, in total, we see the numbers get rather large over time.
In this video I discuss how people who are involvedi n cryptocurrency, especially on Hive, are seeing how this is done. We get 10, 15, or 20 different tokens per day. Individually, they do not add up to much. However, collectively, over time, when reinvested, they can amount to a great deal. The power of compound interest is vital in this endeavor.