Why would we need more nickels? Transactions will end up being rounded to the nearest nickel, which will end up being a dime on one side or a nickel on the other as the smallest necessary coin. Seems like it all evens out.
The only logical argument I can imagine is that people are using stacks of 5 pennies now routinely instead of nickels. But personally I never see that happening.
Getting rid of pennies/nickels sure, but where does the gold standard come in?
You want to tie the economy to a material that doesn't capture economic growth and which also has its remaining stores in areas of the world not owned by your nation?
If Google wasn't lying to me with its response, the current USA gdp is over $20 trillion, and the US owns around $200 billion in gold.
Wouldn't tying gold to the current economy either devalue the dollar or inflate the current value of gold before locking the country into a state of economic stagnation?