indeed one of the biggest income banks is from interest but much more bank income apart from interest such as insurance policy, administration fee every month, from auction market, home and vehicle loan financing and many more.
Truly is,that those who had mentioned is the way banks making their money,but i think one of the most important we must learn is banks uses our money in other form of business that generates them income.this is the sad reality that we as depositors whos trusting them our money received so tiny profit or interests while they earn alot by using our own money..thats why we're lucky having cryptocurrency because this gives us another option to put our money and generates larger amounof profit if we wil only learn how to deal with this