When I say "credit chips", I mean something you can carry that has value by itself. Some sort of cash equivalence. If the new "system" doesn't have cash, then unofficial equivalents will come into use whether that is precious metals or something else.
It seems to me that the people in power always have plenty of backdoor deals and payments going under the table. I don't think they will get rid of cash completely. They might continue to try to put limits on it such as reporting deposits and/or punishing people who carry large amounts with civil asset forfeiture.