So basically, because you cannot cope with the current system you want it scrapped to more favour you. Righto.
As with any player based economy, making currency is fairly easy. As long as you've put the effort in to learn what the current demands are and current going rate of items and then plan for those items.
There will always be fluctuations in price. There will always be people selling at silly prices for quick gil. You just need adapt your prices or move away from that item until it stabilises. Or take a gamble and try take advantage of those situations for greater profit.