I believe in Fiat because it will always be protected by the government. Fiat is a way of controlling people, so it will never disappear
Is the goverment using it for controlling you? Your word is bullshit. The people are not controlling by the goverment, another party or something like that. You believe in fiat because you can use it to fill your daily needs. And the goverment is never trying to controlling you dude. They just take care with the goverment financial system to supporting all of his civilians
I wouldn't be so harsh in your remarks
It is deep in the human nature to control other human beings, so we can't really expect that governments wouldn't be doing the same (since they are just a group of people which gathered some power). Essentially, the very idea behind power comes down to control over population (it is the definition of power itself). The laws accepted are there to do exactly that. The means and ways how this control is exerted may of course vary (from alleged democracy to genuine dictatorship). In fact, I'm inclined to think that you are kidding, are you?
It's alarming how people are so unaware of the "invisible hand" (term came from Mr. Robot, the tv series). You work so you'd get money, yes? You get money so you can finally get that good life that you've been longing all your life. But, since the government wouldn't allow you to get a lot of money from tons of hard work, you can never get a good life. After years of working and proving to your boss that you're worthy of promotion, you'd work and work and work until you die because that's just how it is. You finally get the life that you want but you're very busy on working to maintain the lifestyle that you don't even get to actually live.