When money is hard cold pure silver metal, it cannot easily be counterfeited in mass quantities. This prevents the cartel of private banks known as the Fed from enslaving everyone by constantly stealing their money.
I visited Israel in 1985 when I was studying in Austria. I remember the inflation was insane, and everyone wanted dollars.
I switched the last of my dollars in an Armenian carpet shop, then went to buy my airline ticket back to Greece, where I could use my rail pass to get back to school. But they wouldn't sell me the ticket without proof I'd changed money legally. Shit. Had to go back to the shop and they gave me most of my money back, like 90%. Then I could buy only a standby ticket, but it worked out OK. Dunno what would have happened if I had not been able to leave.
It seems that Fed employees know how to get rich betraying the public.