The most natural way for sustainable demand is to make the coin circulate as currency, not just being used as investment asset - e.g. to be possible to spend it on goods and services.
Persuading businesses to accept it should probably be the next big step for CGA. This would be hard to achieve, but still - if the target is some niche where CGA could fit in naturally, the task may be a bit easier.
Of course, whether to go in that direction is up to Sawedoff to decide. It would require a lot of planning and community support, but my opinion is that even expressing such intent for the future would get CGA higher on the trustworthiness scale.