The point is, the reason gold isn't used as a currency is precisely because it is limited. The reason for FIAT currency is that there is a system of regulation to it. Now, one can argue there is too much regulation, but regulation is itself important. For instance, BitCoin's problem if one envisions it as a currency to replace all currency, is that there isn't currently enough of it to be distributed in any worthwhile, equitable way. So, the creators of the system will have to determine how to introduce more BitCoins while trying to both balance equity and not terribly collapse value. Well, that's the same basic thing that happened with FIAT currency. A uniform currency was established, the number of notes had to increase for the sake of equity, doing so introduced other issues, and that had to be adjusted through more messing with the supply of money.
Those advocating for something like the Gold standard fail to recall the reason we got off that train - as a tangible good, inequity is near impossible to address or attempt to control. If in the end how much gold you have means everything, right now the US would have the most at over 8,000 tonnes, more than twice what the Germany or the IMF have, and they're numbers 2 and 3 on the list. That makes the problem of inequity even worse. You establish a return to the days of real wars over gold, rather than the still problematic but arguably less deadly price wars and economic policy wars.
You can curse the FIAT system and call the administrators of that system all the childish names you want. But a return to a static commodity based model isn't any better. As someone else said in their post, BitCoin may be on the right path, but ultimately they're still a good ways from the solution.