Call me paranoid, but Google has too much power.
Bitcoin will be a wrecking ball to the centralized world's economy as it exceeds Tim Draper's predictions (as well as McAfee's). The stock to flow ratio of bitcoin will exceed gold by 2022 which means that its deflationary properties (greed index) will exceed gold. This will cause Gresham's law to play out where bitcoin is hoarded and everyone will be rid of national fiat first (due to the equity disparity creating an equity drain), then they will get rid of their so called "decentralized" cryptos that inflate too much because they don't hold their value as well. This leads to a potential Mad Max scenario because deflationary currencies are a harbinger of economic misery.
Google (Amazon, Facebook, Twitter, etc) is also buying up bitcoin like there's no tomorrow. They don't need privacy on bitcoin because they will control government from behind the scenes. It will probably be the settlement layer for the worlds newly enthroned digital bankers (why the block sizes don't need to increase for them because they don't have to worry about $1000 transaction fees or privacy on chain). Everyone else will be kicked off chain because of this not being able to afford the high transaction fees and all of the alt coins may end up using some sort of QE with Keynsian economic principles which is what got us into our current USD situation. I think a new oligarchy will be formed where the tech rulers will hoard all the bitcoin and the likes of Facebook will force everyone off bitcoin and into GlobalCoin using capital controls.
It is getting harder every day to stay anonymous.
Use Tor and Protonmail. Linux distro's are significantly more secure than Windows or Mac (Qubes and Tails). Those of us who are voluntarists and hold bitcoin will not be able to use it for anything in the physical world once the capital controls are in place. We will have to leave our national origins behind for bitcoin citadels because most of the people in the world will have less than 0.001 bitcoin and they will be extremely angry at what "bitcoin" has done to them. It won't solve the wealth disparity because nature (as well as crypto adoption) is power law distributed. There will be squads of people hunting down bitcoin hodlers.
I hope that this is wrong, but it's my current thinking. I think privacy tech will be too late and even if we get that and manage to stay decentralized in the process, what everyone's forgetting is that socialists seize the means of production. Therefore "illicit" crypto's won't be useful for anything in the physical world outside of the black market. We will have to tuck away in obscure hiding places among the original OG's who still believe in voluntarism.
We will have our revolution all right. The problem is that we'll just be replacing the old analog dinosaur oligarch's with new digital technocratic oligarch's. (Thanks to 
RE: The True Cost of the Internet