True that gold has no intrisic value, it's value is derived from other people valuing it and willing to trade services for it - and they have done so for thousands of years, where as a typical fiat currency (USD) does not have such a timespan. "Paper money eventually returns to its intrinsic value – zero." (Voltaire, 1694-1778)
btw - as i understand it wasn't a 10% tax, it was a mandatory debt for equity trade- meaning the depositors now own some part of the bank.