Well, there are a few things:
My brain explodes when I read statements from government sources (in my country) about how they will create their own cryptocurrency. Or how and when they will come up with a law on the regulation of existing cryptocurrencies. They only see the money, but do not see the technology, and don't want to use it for other tasks.
My brain explodes from the possibility once and for all get rid of any frauds and scams (almost in any field) using this technology, and at the same time it allows you to hide any information.
My brain is exploding that we all use this technology primarily to make money. Every blockchain project and every user of these projects, the focus is primarily on earnings. I can't say that it is bad (still, I'm here) but I think we are moving in the wrong direction.
My brain explodes from the fact that more and more people know about the blockchain, but don't know what is it, how it works, although it's possible that just a few years our whole life will be built on it.
Hey ! I think your points are well explained but the last one is how it will be in 5-10 years from now, if the cryptos go mainstream and a large chunk of the population uses it, only a few geeks will understand it. Just take a look at the Internet, or the radio. It was reserved for aficionados and tech lovers and geeks ebfore it reaches the overall world, and even then, no one understand how radio or TV or Internet works properly. And too many peeps don't care about it hence the trouble to make them understand the Net Neutrality principle.
Partly you are right about the example with the TV and radio, but, consider that these technologies have never been closely linked with your personal data, while blockchain in theory and in the long term, will be a key information about you as a citizen and about all your money.