Atomos = Inflation...

[Ladon]

It's likely just going to be temporary as the game has a lot of decent gil sinks in the form of multi-melding.

A lot more money is entering the economy right now but a lot more is going to start disappearing too as people will have the gil and will take the risk on more double or triple melds which should eat up a good amount of the gil coming in. This is going to have an intimidate impact on materia prices as demand for them goes up but it will eventually settle back down once the event is over and enough gil is blown up in failed melds.