I don't see wallet apps and miners as third-parties. These parties have inherent interest in crypto succeeding. If miners start attacking the network that hurts

I don't see wallet apps and miners as third-parties. These parties have inherent interest in crypto succeeding. If miners start attacking the network that hurts the value of the currency. In my view a third-party would be your ISP (that wants to deep inspect your packets to see who you are transacting with), or an government. You are in control of fiat only if you are in control of your government. Not many countries are democratic. And even those who are, are often only so on paper.