I haven't had any gil issues so far since I leveled monk to 50 but also leveled leatherworker to 50 quickly afterwards.

I'm still concerned though, because pretty much ALL of my gil comes from other players. Once you're done questing, the gil rewards from leves and FATEs amount to an extremely small income.

So...what happens when the number of new players dwindles and the vast majority of people are raiding?

I'm doing great right now, making an easy 100k daily in profits off the AH by just taking a few minutes out of my day to craft 3-4 things, but I'm not sure what's going to happen when no one can afford to buy anything I sell.