If we are going by the numbers on this list, even if there were more banks, you'd need a minimum of 36,000 more banks with 50 billion each in derivatives in order to remotely approach 2 quadrillion if my math is correct. Since the list is in descending order, the number of banks would likely need to be even more than 40,000.
I think there was a lot of banks not shown in the picture.
If we are going by the numbers on this list, even if there were more banks, you'd need a minimum of 36,000 more banks with 50 billion each in derivatives in order to remotely approach 2 quadrillion if my math is correct. Since the list is in descending order, the number of banks would likely need to be even more than 40,000.