i was thinking... if we created several different banking accounts and each costing a different amount to open and has a different interest rate.
For example:
0-100 NP$, costs 10 NP$ to open and has x% interest.
101-500 NP$, costs $50 NP$ to open and has y% interest.
501-1000 NP$, costs $100 NP$ to open and has z% interest.
1001-5000NP$, costs $500 NP$ to open and has something% interest.
We could also be allowed to upgrade from one account to the next... this way the costs it takes to open the bank might, depending on the interest rate, be paid from the interest. Also, as most banks do, there should be a way to "borrow" NP$. Of course paying back the debt would require interest..and there must be some way of guaranteeing that the person does return the NP$ to the bank....with the added interest...
It may be a little complicated but if we're dealing with NP$, which I hear has some actual monetary value, we should probably have some place to store it.