> Sound completely unfair? Government overstep?
Yes, if I want to try to create a thing I reasonably believe will have value, and I'm honest about it, there should be little regulatory issue. Considering how many other cryptocurrencies there are, I REALLY don't understand at all why SEC cared about this one. There are far more shadier ones around than TON.
> We aren't allowed to sell people something that doesn't exist?
We do that every day. Commodities futures and stock options. Speculative investments in oil, gas, wind, tech, medicine, cars, etc. SOFTWARE. Not only that, we allow people to pay other people with promises they have the right to buy a thing that doesn't exist at a price we set today (unvested non-voting stock options), because we THINK it might be worth more later, although we fully acknowledge it may cease to exist, or even never exist at all (unvested options in a company that never goes public, or sells, and your shares vanish).