Tinfoil hat time!
Gather round kids, crazy old uncle adrian has been wearin his thinking hat a bit too much lately and I think I may have thought of something... I think.. .jpg)
On the conspiracy theory side of things.. block chain tech is seeminlgy more and more perfect for the manipulation and control of the populous should they be forced to participate and be systematically organized.
Often times its stated that our government (who we know without out a doubtnsoies on us) has far too much data to sift through in order to be any real threat to our privacy.. but if all were reduced to is data points to be connected by algorithms (which are already in place in our so called justice system for risk assessment on criminals) how many steps further is it until we're all connected to some type of customizable blockchain which is connected to our online activity and/or history? 
I wonder if it would even be possible?... 
For full disclosure, I hold and trade certain cryptos so Im not trying to freak anyone out or scare them away.. just sharing half baked thoughts!
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You're saying what a lot of people have said. Just because they're worried. I don't think it's going to happen that easily. There will always be resistence and a new technology created when a need arises.
That's the simple version of me saying, "even if what your worry is comes true.. there will be some thing next that some creates to fix the problem right afterwards, so don't worry"