Even if you are right, and somehow manage to launch a crypto that people expect to use as a currency and not for speculation (you'd better not include any other features than pegging, if so, or it will become speculative), then this proposal still cannot work because you can't do anything when the market undervalues the coin.
This is right, and there's nothing anyone can do about that in any speculative token system. The only thing my proposition would have going for it, is that at least, there is no risk that it becomes a greater-fool token, and as such, that when it has value, this is mostly a currency-usage value, which is a genuine economic utility value. Something that has genuine economic utility (hence, has fundamentals) usually has less volatility than a greater-fool token, and its steadiness of price may induce a stickiness that makes people believe more firmly in exactly that value ; as such, whenever it lowers, there's more speculative potential to see this as an opportunity, because one knows that behind it, there's economic utility, than when the token is essentially ONLY used to speculate on.