You are not meant to get rich by picking up money drops from mobs lol. You get rich by what you drop from mobs,...depending on the ingame economy. No need to make things "faster" lmao.
Get to max lvl and farm mobs to make zeni with the drops, that's how it works. And you can also do some crafting and sell the results that are good. Atm you can forget that tho. Wait for wipe and then do what i wrote. Easy money...