Do we have enough gold to actually implement a gold standard?
Sure. Gold might be $10,000 an ounce, though.
You shouldn’t need enough gold to back every single banknote in circulation. The purpose of it is to instill confidence in the currency and fiscal discipline in government spending policies, with enough gold coinage held in reserve to supply reasonable demand.
How much gold do you imagine we need? All it means it that dollar=X amount of gold. 10 pounds would be “enough”.
Not even close. At current prices the government holds enough to run operations for a month or two, and they had to steal every bitl of that back in Grandad’s day. It’s a huge pile to be sure, though equal in value to just one major company on the stock exchange - say, Apple Inc.