Criticisms of Zcash
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With an account, you can revise, criticize, and comment on ideas.Zcash will become the next money. That's because it contains bitcoin's solutions to fiat, and also solves bitcoin's lack of privacy.
Bitcoin (and by extension Zcash) does not solve fiat. A key problem of fiat is that it isn’t backed by anything. Bitcoin isn’t backed my anything, and as far as I know, neither is Zcash.
Bitcoin is backed by POW or computational work or encryption.
“Bitcoin is not backed by anything” can also be stated as “Bitcoin is not redeemable in anything”.
“POW” or “computational work” or “encryption” are not things you can redeem if you own bitcoin.
This is in contrast to gold-backed currencies, for example, which are currencies which can be redeemed in gold. The United States Federal Reserve Note only became fiat when it was no longer redeemable in gold.
In a gold standard society, gold doesn't need to be backed by anything. The same would be true for Bitcoin and Zcash. The US Federal Reserve Notes used to be backed by gold to prevent excessive money creation, gold itself, Bitcoin and ZCash won't need to be backed by anything due to their inherent scarcity.
The reason to back a currency with gold or some other commodity is that the commodity has other utility aside from being used as money. This sets a floor on the price, making it a store of value.
Bitcoin and Zcash have no utility beyond their transferability. The only way either would ever be money is if a government made it their legal tender, forcing transactions to be done with it exclusively.
To use US Dollar as an example again, the only reason it is money is that it has the alternative utility function of being the only thing the government will accept for tax payments. In that sense it is the only currency that keeps you out jail if you use it in its designated geographical area (!). If that weren’t the case then people would quickly swap to using something else—something that isn’t being manipulated by the government.
(To prevent any confusion, please understand that I believe governments should be completely agnostic to how people carry out their transactions, including allowing them to use any currency and even old-school barter if they wish.)
TL;DR The only way for the US Dollar, or Bitcoin, or Zcash (or any other unbacked currencies) to be useful as money is if a government makes them legal tender, and prohibits anything else being used in transactions.
The reason to back a currency with gold or some other commodity is that the commodity has other utility aside from being used as money. This sets a floor on the price, making it a store of value.
Utility is not a necessary aspect of money. Only 5-10% of gold's value is tied to its industrial use (https://www.statista.com/statistics/299609/gold-demand-by-industry-sectorshare/#:~:text=The%20jewelry%20industry%20accounted%20for,China%2C%20Russia%2C%20and%20Australia). Another 40% is used for jewellery.
This floor is not so reassuring if the asset were to plummet 50%. Other commodities, such as silver, have a greater industrial utility. That makes it less suitable as money since its value becomes tied to commodity cycles.
The reason to back a currency with gold or some other commodity is mainly due to its scarcity, which puts a limit on money creation (done through fractional reserve banking).
The price of a commodity and the quantity of it in use don’t strictly correlate in the way you suggest here. 50% of gold being tied up in industry, jewellery, etc. does not mean the price floor is at 50% of the current price.