Governments say cash payments are associated with criminal activity, then seize the cash without proof. It's pure theft. In the jurisdiction where I practiced it was just understood that a defendant would never get back any personal property that was seized during a search, whether the person was found guilty or not. I tried, but was always told the items were lost. I have even had cases where the FBI did this.
Ninth circuit tends to be motivated by politics not legal principles
When the case went before a lower court last year, federal Judge Gary Klausner ruled that the FBI's inventory of the seized safe deposit boxes was legal, despite acknowledging that attorneys for the plaintiffs "have certainly shown that the government had a dual motive in inventorying the contents of each deposit box."
You thougth for a minute in the land of the free you could send your cash freely on courrier.. Think again
Actually the company warns you you cant send money that way.. But there are special services that carry money. You just need to pay ectra and probably be flagged on some list.