>people would be more interested in a coin that is enforced to be $1.00
I have some of these in my wallet right now, in fact.
But as to your question - why would anyone be interested in a $1 coin "even if it had nothing backing it"? The attractiveness of backed-by-nothing cryptocurrencies is the potential for wild upswings. That's lost in a hypothetical programmed-to-$1 digital currency.
And to preempt any comments about fiat, the USD is backed by "the full faith and credit" of the US Government, which at the current time is made tangible through military and economic force.
Finally, currency prices are dictated by the price people are willing to pay. There's no such thing as what you are suggesting if people refuse to pay $1 for it.
