The way you described gold, and it's perceived worth, was spot on. My take though, is that at least gold has always held a constant steady value. There's only so much of it, and because of that, if paper money backed by it was used, there could only be so much paper money printed. I don't like that new money can be printed out of nowhere, with nothing guaranteeing it's value except 'trust'. What happens when that trust is finally lost? WE LOSE.
The problem with your argument is that with a gold standard, gold's value
isn't going to "h[o]ld a constant steady value." Rather, because as you said, "there's only so much of it," gold's value will dramatically increase as the economy grows. This is bad, and here's how:
As the economy gets larger and larger we need more and more money to grease the engine so to speak. In a gold-backed economy there's only two ways to respond to the need for more cash: 1. find more gold (pretty hard if not impossible given the quantity we're talking about) or 2. increase the value of the gold we have. 1. is pretty much impossible, so 2. becomes our only option other than recession/depression. What this means is that as long as the economy continues growing, the value of gold is going to have to keep on increasing. If gold was worth (for example) $1000 in 2010, then deflationary pressure- or government fiat- will dramatically increase the value with each passing year. Within a few years, gold could easily triple, quadruple several times over. This deflation HAS to happen in a gold-backed, growing economy or else there wouldn't be enough cash.
The problem with this scenario is that the deflationary pressure on gold will severely discourage investment and spending. In a gold backed economy why lend money, even at interest, when I can increase the value of my holdings by simply not spending it? Under the current system, if you want to increase the value of your assets you HAVE to invest- just like banks currently do. If you invest wisely, then you can dramatically increase your holdings, but your investment has the added side effect of encouraging growth, creating jobs, spurring innovation, etc. etc. In a gold-backed system investors have no reason to invest, loan, or buy because their gold holding will, due to the inherent nature of the system, inexorably increase. If anything, a gold standard system
discourages investment. The deflationary pressure on the currency would make repaying loans almost impossible, so why loan at all. Once people realize this simple truth then, rather than invest, speculators and anyone with a brain is going to sit on their gold and watch it's value spiral upward. That's great for the individual speculators, but the economy will hit the tanker because suddenly there's no currency anymore.
Ultimately you'll find yourself enslaved to a very small, influential group of people who stocked up on gold beforehand, then waited while deflation exponentiates the value of their holdings
with absolutely no effort on their part, and to the detriment of every other member of the economic system.