That being said, the fact is that the Supreme Court said nothing about state banks being able to issue their own currency, as was the case prior to 1864. The ruling discussed the applicability of state law to nationally chartered banks. While Federal law prevails over state law, state laws can be enforced on National banks or Federal savings associations as long as state laws do not restrict the authorities granted under the Federal charter.
There’s not going to be a break up of the states. The US is going to a new Go!d backed monetary system very shortly.