The difference between gold silver and copper VS printed money backed by nothing is hundreds of hundreds of years of time tested value. Hell, thousands of years really...
Gold silver and copper can actually be used for important things, and it's rare... The printing of money will change possibly in your life time. Not even getting into inflation due to the never ending expansion of the money supply.
More or less an apples worth might depend on how hungry a person is but even if a printed money is destroyed during a time of war or Depression, the seller understands that gold/silver will one day hold direct value again, possibly even still have great value at the moment while that paper money could be used to build a fire.
Gold/silver has withstood the test of time, paper money backed by nothing has proven to fail over and over againÂ… Just look at the American dollar, today.