Infinite Gil Trick
From Final Fantasy Wiki
The Infinite Gil Trick is a way of gaining infinite Gil in Final Fantasy V. To perform this relatively simple trick, all you have to do is enter the pub in Regole and dance on the stage there. Once finished, the pub owner will give you 100 Gil. He will proceed to give you 100 Gil every single time you dance onstage, whether it be in World 2 or World 3. Accumulating an ample amount of Gil this way will take some time, but at lower levels it is quicker and easier than defeating monsters and earning Gil that way.
