lol it wont happen  . banks will never get closed but it will only get modernized , as you can see banks supports mobile and online platfroms now  but with the growing success of banks  , many payment method are also being introduced and one of it is bitcoin/crypto  . right now bitcoin is already popular too and will be more popular in the times like this when there is a problem on financial  as it acts as an alternative to banks or fiats  but no one predicted events like this could happen , so i believe that bitcoin isnt created for times like this  .