You're not supposed to save your private wallet keys on your mobile device any more than you're supposed to stash your gold on a folding table in the front yard.
What high-end equipment do you possess that can tell you the difference between gold and gold-plated tungsten, or a silver-coated non-feric slug coin?
That's a physical "hack", and there are stories out there. (My favorite is the Chinese bank that discovered that its entire bullion inventory was tungsten.)
Gold and silver have a "HUGE attack surface" to physical theft.
You're not supposed to save your private wallet keys on your mobile device any more than you're supposed to stash your gold on a folding table in the front yard.
What high-end equipment do you possess that can tell you the difference between gold and gold-plated tungsten, or a silver-coated non-feric slug coin?
That's a physical "hack", and there are stories out there. (My favorite is the Chinese bank that discovered that its entire bullion inventory was tungsten.)