For that to be true, that coin needs to abide to the same laws as real currency.
If I say that "1 dollar = 1 virtual thingy" and suddenly there are a lot of virtual thingies and their price fall, then what's the crime aside me personally being a lying f*ck that can´t be trusted anymore?
I don't see how "legitDollarCoins" is legally more legit than, say, lootboxes.