People need to understand the role currency plays in an economy before making an informed decision.

Currency is only a medium of trade. The number of dollars that exist in the world has NO impact on our standard of living, the number of things we can produce or services we can provide. These products and services are determined solely by the limiting factors of labor ( the people, how well they have been trained and what they have been trained for) and the resources those people can take advantage of.

Similarily, in FFXIV, it does not matter if the total number of gil is 73 quadrillion, or 5. As long as you can divide of the total gil into a way that still allows it to be a medium of trade, it is sufficient.

Now, that is not to say that a change in the total number does not matter. The rate of change in the total gil is important, as it effects peoples' behaviors in a negative way.

The best thing SE can do once ARR is booted back up, is keep the total gil, whatever it may be or whatever concentration it may be in, stable.

The best way to do this is to have NO gil sinks and NO new influxes of gil. New additions of players does not warrant the need for a growing currency base, just as in real life, larger populations do not justify inflation.

This would mean, not being able to sell items to NPCs, as it is wasteful. You would sell everything on the market for cheap. This would improve the actual economy, as more resources would be available for a lower cost. This also means, things like chocobo rides and airship trips would be free. You would also have to purchase everything you wanted from the market as well.