Completely off topic, but an old family story. My grandfather graduated from Princeton in 1929 (not good timing, but that's another matter). Some time before graduation he was taking a physics class and the teacher was discussing magnetism. The teacher explained that several metals were magnetically attractive -- nickel and cobalt, for example.
"But," the professor said, "There is no metal more attractive than iron."
My grandfather dug out a $20 gold piece and said, "Here is metal more attractive." He ended up going into banking.
Bitcoins can disappear into the ethernet in one keystroke. Gold and silver have been money for 5,000 years.
Go Gramps!