You are right, majority of fiat curency is digital, but the difference between bitcoin and digital fiat is that bitcoin is limited and fiat is not. Digital fiat has unlimited supply. It’s no brainer. Bitcoin has already changed the world in many ways, wait what happens in the next few years. It will eventually change everything. I agree with you about everything being voluntary instead of being forced by not having a much of a choice. It actually crossed my mind once about Illuminati as a creators of blockchain. Than I thought about it more and it just didn’t make sense. However, if they did, would we eventually be able to find out? I definitely do believe bitcoin creation was triggered by recent financial crises. As you said, it opened eyes to lot of people.
BTW: isn’t bitcoin futures at some point IOU as well? They are able to bet and make money on future prices without actually buying real bitcoin. This allows them to make money twice as much by buying bitcoin and going long futures and also selling bitcoin and at the same time shorting futures. I believe that was their intention, that’s why the created bitcoin futures.