What AirForceOne said.
Just my few experienced cents though:
I don’t have any need for gil, but I like to always have a little amount as a backup, if I need to buy some mats quickly to craft a bunch of stuff. Before 5.2 I was down to 80k gil, since I’ve spent a lot of gil on furniture.
After 5.2 was released, the first thing I did was to craft a bunch of Cunning Craftsman’s Syrup (Collectable) to turn in for scrips, so I could buy every new Master Book after about half an hour. Then I took a look at the Balance Discord server in the doh/dol channel to see, where the new mats are found. Made alarms for these, gathered all the mats I could get in 1 hour, then started crafting new DoW weapons and put 3 up for 5 million gil each. The first one was bought after 20 minutes, the second after a couple of hours for 1,9m and the third yesterday for 1,8m.
Now I’m at a healthy level of gil again.
Anyone can do this at the start of a new patch and if you want, you can go absolutely nuts, crafting 5 of each weapon & armor and you’ll most likely end up with enough gil to buy a mansion or even more.