Yeah, the timing of when things happen is always tricky. Something can be unsustainable, but still persist for a long time, especially if a lot of investment and infra was put into it already.

That being said, if USG made a fork, I think I'd just treat it as another fiat. I'd still continue to invest in the "true chain", but I'd happily use my "USG-coins" for purchases or whatever as long as the network persists.

The sad thing is that the CEX's will probably call USG-coin "Bitcoin", and those of us holding onto the "true chain" will need to adopt some other name, for the time-being.