Are you really suggesting they open up 20 different bank accounts? And not only pay the monthly account fees but also pay a bookkeeper to upload statements for all 20 banks into the accounting system? And have appropriate controls on all money movements? And float money between the accounts each time payroll or some large expense is run? And follow the financial results of all of those banks in order to find signs of weakness?

Id rather be in a world where businesses don’t have to spend so much time playing games with their bank accounts and just trust that their money is safe, which is why the fdic needs to guarantee the deposits.