| Thought experiment #3 Create a hypothetical new stable coin. Issue one coin for every dollar put into the stable coin. For every dollar subtracted pay out the dollar and take the coin out of circulation until another USD comes back in. Make money on exchange fees ONLY. No fair using the coins or dollars in any other way. The schemes for stable coins ALL have failure mods until someone does #3. The most likely entity to do #3 is the US treasury (or other national entity). But if someone is willing to live with income from fees only, they could do #3. Crypto currencies have efficiencies enough to make this a viable option. |
USD itself is an interesting stablecoin, algorithmic in nature with a board able to make decisions to change the algorithm. It is not pegged to an asset, rather it attempts to be pegged to an economic state, primarily an inflation rate, using issuance and purchase of other assets. It has failure modes as well.
Note that algorithmic and reserve based crypto stablecoins are both exposed to this, since one is backed and the other is pegged to it.
So if you want to avoid that, you need to peg your cryptocoin to something without that, i.e not a fiat currency. This is hard to do with collateral, some gold backed coins try. Pegging a stablecoin to some commodity or asset or index or "basket" algorithmically is much easier, if somewhat less stable depending on the system that is built to do it.